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mirror of https://github.com/wailsapp/wails.git synced 2025-05-02 09:00:38 +08:00

Update docs to v2.3.0

This commit is contained in:
Lea Anthony 2022-12-29 15:59:38 +11:00
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v2.2.0
v2.3.0

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"theme.SearchModal.placeholder": {
"message": "Search docs",
"description": "The placeholder of the input of the DocSearch pop-up modal"
},
"theme.docs.sidebar.closeSidebarButtonAriaLabel": {
"message": "Close navigation bar",
"description": "The ARIA label for close button of mobile sidebar"
},
"theme.docs.sidebar.toggleSidebarButtonAriaLabel": {
"message": "Toggle navigation bar",
"description": "The ARIA label for hamburger menu button of mobile navigation"
}
}

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"link.item.label.Awesome": {
"message": "Awesome",
"description": "The label of footer link with label=Awesome linking to https://github.com/wailsapp/awesome-wails"
},
"link.item.label.Discord": {
"message": "Discord",
"description": "The label of footer link with label=Discord linking to https://discord.gg/JDdSxwjhGf"
}
}

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{
"label": "Appendix",
"position": 70
}

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{
"label": "Community",
"position": 50
}

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---
sidebar_position: 2
---
# Links
This page serves as a list for community related links. Please submit a PR (click `Edit this page` at the bottom)
to submit links.
## Awesome Wails
The [definitive list](https://github.com/wailsapp/awesome-wails) of links related to Wails.
## Support Channels
- [Gophers Slack Channel](https://gophers.slack.com/messages/CJ4P9F7MZ/)
- [Gophers Slack Channel Invite](https://invite.slack.golangbridge.org/)
- [Github Issues](https://github.com/wailsapp/wails/issues)
- [v2 Beta Discussion Board](https://github.com/wailsapp/wails/discussions/828)
## Social Media
- [Twitter](https://twitter.com/wailsapp)
- [Wails Chinese Community QQ Group](https://qm.qq.com/cgi-bin/qm/qr?k=PmIURne5hFGNd7QWzW5qd6FV-INEjNJv&jump_from=webapi) - Group number: 1067173054
## Other Tutorials and Articles
- [Building of Bulletin Board](https://blog.customct.com/building-bulletin-board)

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{
"label": "Showcase",
"position": 1
}

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# EmailIt
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/emailit.webp").default} />
<br />
</p>
```
[EmailIt](https://github.com/raguay/EmailIt/) is a Wails 2 program that is a markdown based email sender only with nine notepads, scripts to manipulate the text, and templates. It also has a builtin [Node-Red](https://nodered.org/) server, scripts terminal, and the [ScriptBar](https://github.com/raguay/ScriptBarApp) program for displaying results from Node-Red or a script on your system. Documentation is very scarce, but the programs works. Its built using Wails2 and Svelte, and the download is a universal macOS application.

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# EncryptEasy
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/encrypteasy.webp").default} />
<br />
</p>
```
**[EncryptEasy](https://www.encrypteasy.app) is a simple and easy to use PGP encryption tool, managing all your and your contacts keys. Encryption should be simple. Developed with Wails.**
Encrypting messages using PGP is the industry standard. Everyone has a private and a public key. Your private key, well, needs to be kept private so only you can read messages. Your public key is distributed to anyone who wants to send you secret, encrypted messages. Managing keys, encrypting messages and decrypting messages should be a smooth experience. EncryptEasy is all about making it easy.

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# FileHound Export Utility
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/filehound.webp").default} />
<br />
</p>
```
[FileHound Export Utility](https://www.filehound.co.uk/) FileHound is a cloud document management platform made for secure file retention, business process automation and SmartCapture capabilities.
The FileHound Export Utility allows FileHound Administrators the ability to run a secure document and data extraction tasks for alternative back-up and recovery purposes. This application will download all documents and/or meta data saved in FileHound based on the filters you choose. The metadata will be exported in both JSON and XML formats.
Backend built with:
Go 1.15
Wails 1.11.0
go-sqlite3 1.14.6
go-linq 3.2
Frontend with:
Vue 2.6.11
Vuex 3.4.0
Typescript
Tailwind 1.9.6

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# Minecraft Updater
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img
src={
require("@site/static/img/showcase/minecraft-mod-updater.webp").default
}
/>
<br />
</p>
```
[Minecraft Updater](https://github.com/Gurkengewuerz/MinecraftModUpdater) is a utility tool to update and synchronize Minecraft mods for your userbase. Its built using Wails2 and React with [antd](https://ant.design/) as frontend framework.

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# Modal File Manager
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img
src={require("@site/static/img/showcase/modalfilemanager.webp").default}
/>
<br />
</p>
```
[Modal File Manager](https://github.com/raguay/ModalFileManager) is a dual pane file manager using web technologies. My original design was based on NW.js and can be found [here](https://github.com/raguay/ModalFileManager-NWjs). This version uses the same Svelte based frontend code (but it has be greatly modified since the departure from NW.js), but the backend is a [Wails 2](https://wails.io/) implementation. By using this implementation, I no longer use command line `rm`, `cp`, etc. commands. It is fully coded using Go and runs much faster than the previous versions.
This file manager is designed around the same principle as Vim: a state controlled keyboard actions. The number of states isn't fixed, but very programmable. Therefore, an infinite number of keyboard configurations can be created and used. This is the main difference from other file managers.

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# Molley Wallet
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/mollywallet.webp").default} />
<br />
</p>
```
[Molly Wallet](https://github.com/grvlle/constellation_wallet/) the official $DAG wallet of the Constellation Network. It'll let users interact with the Hypergraph Network in various ways, not limited to producing $DAG transactions.

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# October
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/october.webp").default} />
<br />
</p>
```
[October](https://october.utf9k.net) is a small Wails application that makes it really easy to extract highlights from [Kobo eReaders](https://en.wikipedia.org/wiki/Kobo_eReader) and then forward them to [Readwise](https://readwise.io).
It has a relatively small scope with all platform versions weighing in under 10MB, and that's without enabling [UPX compression](https://upx.github.io/)!
In contrast, the author's previous attempts with Electron quickly bloated to several hundred megabytes.

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# Optimus
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/optimus.webp").default} />
<br />
</p>
```
[Optimus](https://github.com/splode/optimus) is a desktop image optimization application. It supports conversion and compression between WebP, JPEG, and PNG image formats.

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# Portfall
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/portfall.webp").default} />
<br />
</p>
```
[Portfall](https://github.com/rekon-oss/portfall) - A desktop k8s port-forwarding portal for easy access to all your cluster UIs

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# Restic Browser
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img
src={require("@site/static/img/showcase/restic-browser-2.png").default}
/>
<br />
</p>
```
[Restic-Browser](https://github.com/emuell/restic-browser) - A simple, cross-platform [restic](https://github.com/restic/restic) backup GUI for browsing and restoring restic repositories.

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# RiftShare
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/riftshare-main.webp").default} />
<br />
</p>
```
Easy, Secure, and Free file sharing for everyone. Learn more at [Riftshare.app](https://riftshare.app)
## Features
- Easy secure file sharing between computers both in the local network and through the internet
- Supports sending files or directories securely through the [magic wormhole protocol](https://magic-wormhole.readthedocs.io/en/latest/)
- Compatible with all other apps using magic wormhole (magic-wormhole or wormhole-william CLI, wormhole-gui, etc.)
- Automatic zipping of multiple selected files to send at once
- Full animations, progress bar, and cancellation support for sending and receiving
- Native OS File Selection
- Open files in one click once received
- Auto Update - don't worry about having the latest release!

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# ScriptBar
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/scriptbar.webp").default} />
<br />
</p>
```
[ScriptBar](https://GitHub.com/raguay/ScriptBarApp) is a program to show the output of the embedded [Node-Red](https://nodered.org) server in the [EmailIt](https://GitHub.com/raguay/EmailIt) application. It also displays the output of scripts on your system. ScriptBar doesn't put them in the menubar, but has them all in a convient window for easy viewing. You can have multiple tabs to have many different things show. You can also keep the links to your most visited web sites.

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# Surge
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/surge.png").default} />
<br />
</p>
```
[Surge](https://getsurge.io/) is a p2p filesharing app designed to utilize blockchain technologies to enable 100% anonymous file transfers. Surge is end-to-end encrypted, decentralized and open source.

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# Wally
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/wally.webp").default} />
<br />
</p>
```
[Wally](https://ergodox-ez.com/pages/wally) is the official firmware flasher for [Ergodox](https://ergodox-ez.com/) keyboards. It looks great and is a fantastic example of what you can achieve with Wails: the ability to combine the power of Go and the rich graphical tools of the web development world.

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# Wombat
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/wombat.webp").default} />
<br />
</p>
```
[Wombat](https://github.com/rogchap/wombat) is a cross platform gRPC client.

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# Ytd
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img src={require("@site/static/img/showcase/ytd.webp").default} />
<br />
</p>
```
[Ytd](https://github.com/marcio199226/ytd/tree/v2-wails) is an app for downloading tracks from youtube, creating offline playlists and share them with your friends, your friends will be able to playback your playlists or download them for offline listening, has an built-in player.

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---
sidebar_position: 1
---
# Templates
This page serves as a list for community supported templates. Please submit a PR (click `Edit this page` at the bottom)
to include your templates. To build your own template, please see the [Templates](../guides/templates.mdx) guide.
To use these templates, run `wails init -n "Your Project Name" -t [the link below[@version]]`
If there is no version suffix, the main branch code template is used by default. If there is a version suffix, the code template corresponding to the tag of this version is used.
Example: `wails init -n "Your Project Name" -t https://github.com/misitebao/wails-template-vue`
:::warning Attention
**The Wails project does not maintain, is not responsible nor liable for 3rd party templates!**
If you are unsure about a template, inspect `package.json` and `wails.json` for what scripts are run and what packages are installed.
:::
## Vue
- [wails-template-vue](https://github.com/misitebao/wails-template-vue) - Wails template based on Vue ecology (Integrated TypeScript, Dark theme, Internationalization, Single page routing, TailwindCSS)
- [wails-vite-vue-ts](https://github.com/codydbentley/wails-vite-vue-ts) - Vue 3 TypeScript with Vite (and instructions to add features)
- [wails-vite-vue-the-works](https://github.com/codydbentley/wails-vite-vue-the-works) - Vue 3 TypeScript with Vite, Vuex, Vue Router, Sass, and ESLint + Prettier
## Angular
- [wails-angular-template](https://github.com/TAINCER/wails-angular-template) - Angular with TypeScript, Sass, Hot-Reload, Code-Splitting and i18n
## React
- [wails-react-template](https://github.com/AlienRecall/wails-react-template) - A template using reactjs
- [wails-react-template](https://github.com/flin7/wails-react-template) - A minimal template for React that supports live development
- [wails-template-nextjs](https://github.com/LGiki/wails-template-nextjs) - A template using Next.js and TypeScript
- [wails-vite-react-ts-tailwind-template](https://github.com/hotafrika/wails-vite-react-ts-tailwind-template) - A template for React + TypeScript + Vite + TailwindCSS
## Svelte
- [wails-svelte-template](https://github.com/raitonoberu/wails-svelte-template) - A template using Svelte
- [wails-vite-svelte-template](https://github.com/BillBuilt/wails-vite-svelte-template) - A template using Svelte and Vite
- [wails-vite-svelte-tailwind-template](https://github.com/BillBuilt/wails-vite-svelte-tailwind-template) - A template using Svelte and Vite with TailwindCSS v3
- [wails-sveltekit-template](https://github.com/h8gi/wails-sveltekit-template) - A template using SvelteKit
## Elm
- [wails-elm-template](https://github.com/benjamin-thomas/wails-elm-template) - Develop your GUI app with functional programming and a **snappy** hot-reload setup :tada: :rocket:
- [wails-template-elm-tailwind](https://github.com/rnice01/wails-template-elm-tailwind) - Combine the powers :muscle: of Elm + Tailwind CSS + Wails! Hot reloading supported.
## Pure JavaScript (Vanilla)
- [wails-pure-js-template](https://github.com/KiddoV/wails-pure-js-template) - A template with nothing but just basic JavaScript, HTML, and CSS

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{
"label": "Getting Started",
"position": 10
}

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---
sidebar_position: 6
---
# Compiling your Project
From the project directory, run `wails build`.
This will compile your project and save the production-ready binary in the `build/bin` directory.
If you run the binary, you should see the default application:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/defaultproject.webp").default}
width="50%"
class="screenshot"
/>
</div>
<br />
```
For more details on compilation options, please refer to the [CLI Reference](../reference/cli.mdx#build).

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---
sidebar_position: 5
---
# Developing your Application
You can run your application in development mode by running `wails dev` from your project directory. This will do the following things:
- Build your application and run it
- Bind your Go code to the frontend so it can be called from Javascript
- Using the power of [Vite](https://vitejs.dev/), will watch for modifications in your Go files and rebuild/re-run on change
- Sets up a [webserver](http://localhost:34115) that will serve your application over a browser. This allows you to use your favourite browser extensions. You can even call your Go code from the console
To get started, run `wails dev` in the project directory. More information on this can be found [here](../reference/cli.mdx#dev).
Coming soon: Tutorial

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---
sidebar_position: 2
---
# Creating a Project
## Project Generation
Now that the CLI is installed, you can generate a new project by using the `wails init` command.
Pick your favourite framework:
```mdx-code-block
import Tabs from "@theme/Tabs";
import TabItem from "@theme/TabItem";
<Tabs
defaultValue="Svelte"
values={[
{label: "Svelte", value: "Svelte"},
{label: "React", value: "React"},
{label: "Vue", value: "Vue"},
{label: "Preact", value: "Preact"},
{label: "Lit", value: "Lit"},
{label: "Vanilla", value: "Vanilla"},
]}
>
<TabItem value="Svelte">
Generate a <a href={"https://svelte.dev/"}>Svelte</a> project using Javascript with:<br/><br/>
wails init -n myproject -t svelte
If you would rather use Typescript:<br/>
wails init -n myproject -t svelte-ts
</TabItem>
<TabItem value="React">
Generate a <a href={"https://reactjs.org/"}>React</a> project using Javascript with:<br/><br/>
wails init -n myproject -t react
If you would rather use Typescript:<br/>
wails init -n myproject -t react-ts
</TabItem>
<TabItem value="Vue">
Generate a <a href={"https://vuejs.org/"}>Vue</a> project using Javascript with:<br/><br/>
wails init -n myproject -t vue
If you would rather use Typescript:<br/>
wails init -n myproject -t vue-ts
</TabItem>
<TabItem value="Preact">
Generate a <a href={"https://preactjs.com/"}>Preact</a> project using Javascript with:<br/><br/>
wails init -n myproject -t preact
If you would rather use Typescript:<br/>
wails init -n myproject -t preact-ts
</TabItem>
<TabItem value="Lit">
Generate a <a href={"https://lit.dev/"}>Lit</a> project using Javascript with:<br/><br/>
wails init -n myproject -t lit
If you would rather use Typescript:<br/>
wails init -n myproject -t lit-ts
</TabItem>
<TabItem value="Vanilla">
Generate a Vanilla project using Javascript with:<br/><br/>
wails init -n myproject -t vanilla
If you would rather use Typescript:<br/>
wails init -n myproject -t vanilla-ts
</TabItem>
</Tabs>
```
<hr />
There are also [community templates](../community/templates.mdx) available that offer different capabilities and frameworks.
To see the other options available, you can run `wails init -help`.
More details can be found in the [CLI Reference](../reference/cli.mdx#init).
## Project Layout
Wails projects have the following layout:
```
.
├── build/
│ ├── appicon.png
│ ├── darwin/
│ └── windows/
├── frontend/
├── go.mod
├── go.sum
├── main.go
└── wails.json
```
### Project structure rundown
- `/main.go` - The main application
- `/frontend/` - Frontend project files
- `/build/` - Project build directory
- `/build/appicon.png` - The application icon
- `/build/darwin/` - Mac specific project files
- `/build/windows/` - Windows specific project files
- `/wails.json` - The project configuration
- `/go.mod` - Go module file
- `/go.sum` - Go module checksum file
The `frontend` directory has nothing specific to Wails and can be any frontend project of your choosing.
The `build` directory is used during the build process. These files may be updated to customise your builds. If
files are removed from the build directory, default versions will be regenerated.
The default module name in `go.mod` is "changeme". You should change this to something more appropriate.

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---
sidebar_position: 1
---
# Installation
## Supported Platforms
- Windows 10/11 AMD64/ARM64
- MacOS 10.13+ AMD64
- MacOS 11.0+ ARM64
- Linux AMD64/ARM64
## Dependencies
Wails has a number of common dependencies that are required before installation:
- Go 1.18+
- NPM (Node 15+)
### Go
Download Go from the [Go Downloads Page](https://go.dev/dl/).
Ensure that you follow the official [Go installation instructions](https://go.dev/doc/install). You will also need to ensure that your `PATH` environment variable also includes the path to your `~/go/bin` directory. Restart your terminal and do the following checks:
- Check Go is installed correctly: `go version`
- Check "~/go/bin" is in your PATH variable: `echo $PATH | grep go/bin`
### NPM
Download NPM from the [Node Downloads Page](https://nodejs.org/en/download/). It is best to use the latest release as that is what we generally test against.
Run `npm --version` to verify.
## Platform Specific Dependencies
You will also need to install platform specific dependencies:
```mdx-code-block
import Tabs from "@theme/Tabs";
import TabItem from "@theme/TabItem";
<Tabs
defaultValue="Windows"
values={[
{ label: "Windows", value: "Windows" },
{ label: "MacOS", value: "MacOS" },
{ label: "Linux", value: "Linux" },
]}
>
<TabItem value="MacOS">
Wails requires that the xcode command line tools are installed. This can be
done by running <code>xcode-select --install</code>.
</TabItem>
<TabItem value="Windows">
Wails requires that the <a href="https://developer.microsoft.com/en-us/microsoft-edge/webview2/">WebView2</a> runtime is installed. Some Windows installations will already have this installed. You can check using the <code>wails doctor</code> command.
</TabItem>
<TabItem value={"Linux"}>
Linux required the standard <code>gcc</code> build tools plus <code>libgtk3</code> and <code>libwebkit</code>. Rather than list a ton of commands for different distros, Wails can try to determine what the installation commands are for your specific distribution. Run <code>wails doctor</code> after installation to be shown how to install the dependencies. If your distro/package manager is not supported, please consult the <a href={"/docs/guides/linux-distro-support"}>Add Linux Distro</a> guide.
</TabItem>
</Tabs>
```
## Optional Dependencies
- [UPX](https://upx.github.io/) for compressing your applications.
## Installing Wails
Run `go install github.com/wailsapp/wails/v2/cmd/wails@latest` to install the Wails CLI.
## System Check
Running `wails doctor` will check if you have the correct dependencies installed. If not, it will advise on what is missing and help on how to rectify any problems.
## The `wails` command appears to be missing?
If your system is reporting that the `wails` command is missing, make sure you have followed the Go installation guide
correctly. Normally, it means that the `go/bin` directory in your User's home directory is not in the `PATH` environment
variable. You will also normally need to close and reopen any open command prompts so that changes to the environment
made by the installer are reflected at the command prompt.

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{
"label": "Guides",
"position": 50
}

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# Application Development
There are no hard and fast rules for developing applications with Wails, but there are some basic guidelines.
## Application Setup
The pattern used by the default templates are that `main.go` is used for configuring and running the application, whilst
`app.go` is used for defining the application logic.
The `app.go` file will define a struct that has 2 methods which act as hooks into the main application:
```go title="app.go"
type App struct {
ctx context.Context
}
func NewApp() *App {
return &App{}
}
func (a *App) startup(ctx context.Context) {
a.ctx = ctx
}
func (a *App) shutdown(ctx context.Context) {
}
```
- The startup method is called as soon as Wails allocates the resources it needs and is a good place for creating resources,
setting up event listeners and anything else the application needs at startup.
It is given a `context.Context` which is usually saved in a struct field. This context is needed for calling the
[runtime](../reference/runtime/intro.mdx). If this method returns an error, the application will terminate.
In dev mode, the error will be output to the console.
- The shutdown method will be called by Wails right at the end of the shutdown process. This is a good place to deallocate
memory and perform any shutdown tasks.
The `main.go` file generally consists of a single call to `wails.Run()`, which accepts the application configuration.
The pattern used by the templates is that before the call to `wails.Run()`, an instance of the struct we defined in
`app.go` is created and saved in a variable called `app`. This configuration is where we add our callbacks:
```go {3,9,10} title="main.go"
func main() {
app := NewApp()
err := wails.Run(&options.App{
Title: "My App",
Width: 800,
Height: 600,
OnStartup: app.startup,
OnShutdown: app.shutdown,
})
if err != nil {
log.Fatal(err)
}
}
```
More information on application lifecycle hooks can be found [here](../howdoesitwork.mdx#application-lifecycle-callbacks).
## Binding Methods
It is likely that you will want to call Go methods from the frontend. This is normally done by adding public methods to
the already defined struct in `app.go`:
```go {16-18} title="app.go"
type App struct {
ctx context.Context
}
func NewApp() *App {
return &App{}
}
func (a *App) startup(ctx context.Context) {
a.ctx = ctx
}
func (a *App) shutdown(ctx context.Context) {
}
func (a *App) Greet(name string) string {
return fmt.Sprintf("Hello %s!", name)
}
```
In the main application configuration, the `Bind` key is where we can tell Wails what we want to bind:
```go {11-13} title="main.go"
func main() {
app := NewApp()
err := wails.Run(&options.App{
Title: "My App",
Width: 800,
Height: 600,
OnStartup: app.startup,
OnShutdown: app.shutdown,
Bind: []interface{}{
app,
},
})
if err != nil {
log.Fatal(err)
}
}
```
This will bind all public methods in our `App` struct (it will never bind the startup and shutdown methods).
### Dealing with context when binding multiple structs
If you want to bind methods for multiple structs but want each struct to keep a reference to the context so that you
can use the runtime functions, a good pattern is to pass the context from the `OnStartup` method to your struct instances
:
```go
func main() {
app := NewApp()
otherStruct := NewOtherStruct()
err := wails.Run(&options.App{
Title: "My App",
Width: 800,
Height: 600,
OnStartup: func(ctx context.Context){
app.SetContext(ctx)
otherStruct.SetContext(ctx)
},
OnShutdown: app.shutdown,
Bind: []interface{}{
app,
otherStruct
},
})
if err != nil {
log.Fatal(err)
}
}
```
More information on Binding can be found [here](../howdoesitwork.mdx#method-binding).
## Application Menu
Wails supports adding a menu to your application. This is done by passing a [Menu](../reference/menus.mdx#menu) struct
to application config. It's common to use a method that returns a Menu, and even more common for that to be a method on
the `App` struct used for the lifecycle hooks.
```go {11} title="main.go"
func main() {
app := NewApp()
err := wails.Run(&options.App{
Title: "My App",
Width: 800,
Height: 600,
OnStartup: app.startup,
OnShutdown: app.shutdown,
Menu: app.menu(),
Bind: []interface{}{
app,
},
})
if err != nil {
log.Fatal(err)
}
}
```
## Assets
The great thing about the way Wails v2 handles assets is that it doesn't! The only thing you need to give Wails is an
`embed.FS`. How you get to that is entirely up to you. You can use vanilla html/css/js files like the vanilla template.
You could have some complicated build system, it doesn't matter.
When `wails build` is run, it will check the `wails.json` project file at the project root. There are 2 keys in the
project file that are read:
- "frontend:install"
- "frontend:build"
The first, if given, will be executed in the `frontend` directory to install the node modules.
The second, if given, will be executed in the `frontend` directory to build the frontend project.
If these 2 keys aren't given, then Wails does absolutely nothing with the frontend. It is only expecting that `embed.FS`.
### AssetsHandler
A Wails v2 app can optionally define a `http.Handler` in the `options.App`, which allows hooking into the AssetServer to
create files on the fly or process POST/PUT requests.
GET requests are always first handled by the `assets` FS. If the FS doesn't find the requested file the request will be
forwarded to the `http.Handler` for serving. Any requests other than GET will be directly processed by the `AssetsHandler`
if specified.
It's also possible to only use the `AssetsHandler` by specifiy `nil` as the `Assets` option.
## Built in Dev Server
Running `wails dev` will start the built in dev server which will start a file watcher in your project directory. By
default, if any file changes, wails checks if it was an application file (default: `.go`, configurable with `-e` flag).
If it was, then it will rebuild your application and relaunch it. If the changed file was in the assets,
it will issue a reload after a short amount of time.
The dev server uses a technique called "debouncing" which means it doesn't reload straight away,
as there may be multiple files changed in a short amount of time. When a trigger occurs, it waits for a set amount of time
before issuing a reload. If another trigger happens, it resets to the wait time again. By default this value is `100ms`.
If this value doesn't work for your project, it can be configured using the `-debounce` flag. If used, this value will
be saved to your project config and become the default.
## External Dev Server
Some frameworks come with their own live-reloading server, however they will not be able to take advantage of the Wails
Go bindings. In this scenario, it is best to run a watcher script that rebuilds the project into the build directory, which
Wails will be watching. For an example, see the default svelte template that uses [rollup](https://rollupjs.org/guide/en/).
For [create-react-app](https://create-react-app.dev/), it's possible to use
[this script](https://gist.github.com/int128/e0cdec598c5b3db728ff35758abdbafd) to achieve a similar result.
## Go Module
The default Wails templates generate a `go.mod` file that contains the module name "changeme". You should change this
to something more appropriate after project generation.

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@ -1,61 +0,0 @@
# Bleeding Edge
## Overview
Wails is in constant development and new releases are regularly "tagged". This usually happens when all the newer code
on `master` has been tested and confirmed working. If you need a bugfix or feature that has not yet made it to a release,
it's possible to use the latest "bleeding edge" version using the following steps:
- `git clone https://github.com/wailsapp/wails`
- `cd wails/v2/cmd/wails`
- `go install`
NOTE: The directory that you cloned the project into will now be called "clonedir".
The Wails CLI will now be at the very latest version.
### Updating your project
To update projects to use the latest version of the Wails library, update the project's
`go.mod` and ensure the following line is at the bottom of the file:
`replace github.com/wailsapp/wails/v2 => <clonedir>`
Example:
On Windows:
`replace github.com/wailsapp/wails/v2 => C:\Users\leaan\Documents\wails-v2-beta\wails\v2`
On 'nix:
`replace github.com/wailsapp/wails/v2 => /home/me/projects/wails/v2`
To revert to a stable version, run:
`go install github.com/wailsapp/wails/v2/cmd/wails@latest`
## Testing a Branch
If you want to test a branch, follow the instructions above, but ensure you switch the branch you want to test before installing:
- `git clone https://github.com/wailsapp/wails`
- `cd wails`
- `git checkout -b branch-to-test --track origin/branch-to-test`
- `cd v2/cmd/wails`
- `go install`
Make sure you [update your project](#updating-your-project) as described above.
## Testing a PR
If you want to test a PR, follow the instructions above, but ensure you fetch the PR and switch the branch before installing.
Please replace `[IDofThePR]` with the ID of the PR shown on github.com:
- `git clone https://github.com/wailsapp/wails`
- `cd wails`
- `git fetch -u origin pull/[IDofThePR]/head:test/pr-[IDofThePR]`
- `git checkout test/pr-[IDofThePR]`
- `git reset --hard HEAD`
- `cd v2/cmd/wails`
- `go install`
Make sure you [update your project](#updating-your-project) as described above.

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@ -1,141 +0,0 @@
# Dynamic Assets
If you want to load or generate assets for your frontend dynamically, you can achieve that using the
[AssetsHandler](../reference/options#assetshandler) option. The AssetsHandler is a generic `http.Handler` which will
be called for any non GET request on the assets server and for GET requests which can not be served from the
bundled assets because the file is not found.
By installing a custom AssetsHandler, you can serve your own assets using a custom asset server.
## Example
In our example project, we will create a simple assets handler which will load files off disk:
```go title=main.go {16-35,49}
package main
import (
"embed"
"fmt"
"github.com/wailsapp/wails/v2"
"github.com/wailsapp/wails/v2/pkg/options"
"net/http"
"os"
"strings"
)
//go:embed all:frontend/dist
var assets embed.FS
type FileLoader struct {
http.Handler
}
func NewFileLoader() *FileLoader {
return &FileLoader{}
}
func (h *FileLoader) ServeHTTP(res http.ResponseWriter, req *http.Request) {
var err error
requestedFilename := strings.TrimPrefix(req.URL.Path, "/")
println("Requesting file:", requestedFilename)
fileData, err := os.ReadFile(requestedFilename)
if err != nil {
res.WriteHeader(http.StatusBadRequest)
res.Write([]byte(fmt.Sprintf("Could not load file %s", requestedFilename)))
}
res.Write(fileData)
}
func main() {
// Create an instance of the app structure
app := NewApp()
// Create application with options
err := wails.Run(&options.App{
Title: "helloworld",
Width: 1024,
Height: 768,
Assets: assets,
BackgroundColour: &options.RGBA{R: 27, G: 38, B: 54, A: 255},
OnStartup: app.startup,
AssetsHandler: NewFileLoader(),
Bind: []interface{}{
app,
},
})
if err != nil {
println("Error:", err)
}
}
```
When we run the application in dev mode using `wails dev`, we will see the following output:
```
DEB | [ExternalAssetHandler] Loading 'http://localhost:3001/favicon.ico'
DEB | [ExternalAssetHandler] Loading 'http://localhost:3001/favicon.ico' failed, using AssetHandler
Requesting file: favicon.ico
```
As you can see, the assets handler is called when the default assets server is unable to serve
the `favicon.ico` file.
If you right click the main application and select "inspect" to bring up the devtools, you can test
this feature out by typing the following into the console:
```
let response = await fetch('does-not-exist.txt');
```
This will generate an error in the devtools. We can see that the error is what we expect, returned by
our custom assets handler:
```mdx-code-block
<p className="text--center">
<img
src={require("@site/static/img/assetshandler-does-not-exist.webp").default}
/>
</p>
```
However, if we request `go.mod`, we will see the following output:
```mdx-code-block
<p className="text--center">
<img src={require("@site/static/img/assetshandler-go-mod.webp").default} />
</p>
```
This technique can be used to load images directly into the page. If we updated our default vanilla template and
replaced the logo image:
```html
<img id="logo" class="logo" />
```
with:
```html
<img src="build/appicon.png" style="width: 300px" />
```
Then we would see the following:
```mdx-code-block
<p className="text--center">
<img
src={require("@site/static/img/assetshandler-image.webp").default}
style={{ width: "75%" }}
/>
</p>
```
:::warning
Exposing your filesystem in this way is a security risk. It is recommended that you properly manage access
to your filesystem.
:::

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@ -1,89 +0,0 @@
# Frameless Applications
Wails supports application that have no frames. This can be achieved by using the [frameless](../reference/options.mdx#frameless)
field in [Application Options](../reference/options.mdx#application-options).
Wails offers a simple solution for dragging the window: Any HTML element that has the CSS style `--wails-draggable:drag` will
act as a "drag handle". This property applies to all child elements. If you need to indicate that a nested element
should not drag, then use the attribute '--wails-draggable:no-drag' on that element.
```html
<html>
<head>
<link rel="stylesheet" href="/main.css" />
</head>
<body style="--wails-draggable:drag">
<div id="logo"></div>
<div id="input" style="--wails-draggable:no-drag">
<input id="name" type="text" />
<button onclick="greet()">Greet</button>
</div>
<div id="result"></div>
<script src="/main.js"></script>
</body>
</html>
```
For some projects, using a CSS variable may not be possible due to dynamic styling. In this case, you can use the
`CSSDragProperty` and `CSSDragValue` application options to define a property and value that will be used to indicate
draggable regions:
```go title=main.go
package main
import (
"embed"
"github.com/wailsapp/wails/v2"
"github.com/wailsapp/wails/v2/pkg/options"
)
//go:embed all:frontend/dist
var assets embed.FS
func main() {
// Create an instance of the app structure
app := NewApp()
// Create application with options
err := wails.Run(&options.App{
Title: "alwaysontop",
Width: 1024,
Height: 768,
Assets: assets,
Frameless: true,
CSSDragProperty: "widows",
CSSDragValue: "1",
Bind: []interface{}{
app,
},
})
if err != nil {
println("Error:", err)
}
}
```
```html title=index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta content="width=device-width, initial-scale=1.0" name="viewport" />
<title>alwaysontop</title>
</head>
<body style="widows: 1">
<div id="app"></div>
<script src="./src/main.js" type="module"></script>
</body>
</html>
```
:::info Fullscreen
If you allow your application to go fullscreen, this drag functionality will be disabled.
:::

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@ -1,73 +0,0 @@
# Frontend
## Script Injection
When Wails serves your `index.html`, by default, it will inject 2 script entries into the `<body>` tag to load `/wails/ipc.js`
and `/wails/runtime.js`. These files install the bindings and runtime respectively.
The code below shows where these are injected by default:
```html
<html>
<head>
<title>injection example</title>
<link rel="stylesheet" href="/main.css" />
<!-- <script src="/wails/ipc.js"></script> -->
<!-- <script src="/wails/runtime.js"></script> -->
</head>
<body data-wails-drag>
<div class="logo"></div>
<div class="result" id="result">Please enter your name below 👇</div>
<div class="input-box" id="input" data-wails-no-drag>
<input class="input" id="name" type="text" autocomplete="off" />
<button class="btn" onclick="greet()">Greet</button>
</div>
<script src="/main.js"></script>
</body>
</html>
```
### Overriding Default Script Injection
To provide more flexibility to developers, there is a meta tag that may be used to customise this behaviour:
```html
<meta name="wails-options" content="[options]" />
```
The options are as follows:
| Value | Description |
| ------------------- | ------------------------------------------------ |
| noautoinjectruntime | Disable the autoinjection of `/wails/runtime.js` |
| noautoinjectipc | Disable the autoinjection of `/wails/ipc.js` |
| noautoinject | Disable all autoinjection of scripts |
Multiple options may be used provided they are comma seperated.
This code is perfectly valid and operates the same as the autoinjection version:
```html
<html>
<head>
<title>injection example</title>
<meta name="wails-options" content="noautoinject" />
<link rel="stylesheet" href="/main.css" />
</head>
<body data-wails-drag>
<div class="logo"></div>
<div class="result" id="result">Please enter your name below 👇</div>
<div class="input-box" id="input" data-wails-no-drag>
<input class="input" id="name" type="text" autocomplete="off" />
<button class="btn" onclick="greet()">Greet</button>
</div>
<script src="/wails/ipc.js"></script>
<script src="/wails/runtime.js"></script>
<script src="/main.js"></script>
</body>
</html>
```

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@ -1,131 +0,0 @@
# IDEs
Wails aims to provide a great development experience. To that aim, we now support generating IDE specific configuration
to provide smoother project setup.
Currently, we support [Visual Studio Code](https://code.visualstudio.com/) but aim to support other IDEs such as Goland.
## Visual Studio Code
```mdx-code-block
<p className="text--center">
<img
src={require("@site/static/img/vscode.webp").default}
style={{ width: "75%" }}
/>
</p>
```
When generating a project using the `-ide vscode` flags, IDE files will be created alongside the other project files.
These files are placed into the `.vscode` directory and provide the correct configuration for debugging your application.
The 2 files generated are `tasks.json` and `launch.json`. Below are the files generated for the default vanilla project:
```json title="tasks.json"
{
"version": "2.0.0",
"tasks": [
{
"label": "build",
"type": "shell",
"options": {
"cwd": "${workspaceFolder}"
},
"command": "go",
"args": [
"build",
"-tags",
"dev",
"-gcflags",
"all=-N -l",
"-o",
"build/bin/myproject.exe"
]
}
]
}
```
```json title="launch.json"
{
"version": "0.2.0",
"configurations": [
{
"name": "Wails: Debug myproject",
"type": "go",
"request": "launch",
"mode": "exec",
"program": "${workspaceFolder}/build/bin/myproject.exe",
"preLaunchTask": "build",
"cwd": "${workspaceFolder}",
"env": {}
}
]
}
```
### Configuring the install and build steps
The `tasks.json` file is simple for the default project as there is no `npm install` or `npm run build` step needed.
For projects that have a frontend build step, such as the svelte template, we would need to edit `tasks.json` to
add the install and build steps:
```json title="tasks.json"
{
"version": "2.0.0",
"tasks": [
{
"label": "npm install",
"type": "npm",
"script": "install",
"options": {
"cwd": "${workspaceFolder}/frontend"
},
"presentation": {
"clear": true,
"panel": "shared",
"showReuseMessage": false
},
"problemMatcher": []
},
{
"label": "npm run build",
"type": "npm",
"script": "build",
"options": {
"cwd": "${workspaceFolder}/frontend"
},
"presentation": {
"clear": true,
"panel": "shared",
"showReuseMessage": false
},
"problemMatcher": []
},
{
"label": "build",
"type": "shell",
"options": {
"cwd": "${workspaceFolder}"
},
"command": "go",
"args": [
"build",
"-tags",
"dev",
"-gcflags",
"all=-N -l",
"-o",
"build/bin/vscode.exe"
],
"dependsOn": ["npm install", "npm run build"]
}
]
}
```
:::info Future Enhancement
In the future, we hope to generate a `tasks.json` that includes the install and build steps automatically.
:::

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@ -1,110 +0,0 @@
# Linux Distro Support
## Overview
Wails offers Linux support but providing installation instructions for all available distributions is an impossible task.
Instead, Wails tries to determine if the packages you need to develop applications are available via your system's package
manager. Currently, we support the following package managers:
- apt
- dnf
- emerge
- eopkg
- nixpkgs
- pacman
- zypper
## Adding package names
There may be circumstances where your distro uses one of the supported package managers but the package name
is different. For example, you may use an Ubuntu derivative, but the package name for gtk may be different. Wails
attempts to find the correct package by iterating through a list of package names.
The list of packages are stored in the packagemanager specific file in the `v2/internal/system/packagemanager`
directory. In our example, this would be `v2/internal/system/packagemanager/apt.go`.
In this file, the list of packages are defined by the `Packages()` method:
```go
func (a *Apt) Packages() packagemap {
return packagemap{
"libgtk-3": []*Package{
{Name: "libgtk-3-dev", SystemPackage: true, Library: true},
},
"libwebkit": []*Package{
{Name: "libwebkit2gtk-4.0-dev", SystemPackage: true, Library: true},
},
"gcc": []*Package{
{Name: "build-essential", SystemPackage: true},
},
"pkg-config": []*Package{
{Name: "pkg-config", SystemPackage: true},
},
"npm": []*Package{
{Name: "npm", SystemPackage: true},
},
"docker": []*Package{
{Name: "docker.io", SystemPackage: true, Optional: true},
},
}
}
```
Let's assume that in our linux distro, `libgtk-3` is packaged under the name `lib-gtk3-dev`.
We could add support for this by adding the following line:
```go {5}
func (a *Apt) Packages() packagemap {
return packagemap{
"libgtk-3": []*Package{
{Name: "libgtk-3-dev", SystemPackage: true, Library: true},
{Name: "lib-gtk3-dev", SystemPackage: true, Library: true},
},
"libwebkit": []*Package{
{Name: "libwebkit2gtk-4.0-dev", SystemPackage: true, Library: true},
},
"gcc": []*Package{
{Name: "build-essential", SystemPackage: true},
},
"pkg-config": []*Package{
{Name: "pkg-config", SystemPackage: true},
},
"npm": []*Package{
{Name: "npm", SystemPackage: true},
},
"docker": []*Package{
{Name: "docker.io", SystemPackage: true, Optional: true},
},
}
}
```
## Adding new package managers
To add a new package manager, perform the following steps:
- Create a new file in `v2/internal/system/packagemanager` called `<pm>.go`, where `<pm>` is the name of the package manager.
- Define a struct that conforms to the package manager interface defined in `pm.go`:
```go
type PackageManager interface {
Name() string
Packages() packagemap
PackageInstalled(*Package) (bool, error)
PackageAvailable(*Package) (bool, error)
InstallCommand(*Package) string
}
```
- `Name()` should return the name of the package manager
- `Packages()` should return a `packagemap`, that provides candidate filenames for dependencies
- `PackageInstalled()` should return `true` if the given package is installed
- `PackageAvailable()` should return `true` if the given package is not installed but available for installation
- `InstallCommand()` should return the exact command to install the given package name
Take a look at the other package managers code to get an idea how this works.
:::info Remember
If you add support for a new package manager, don't forget to also update this page!
:::

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@ -1,20 +0,0 @@
# Linux
This page has miscellaneous guides related to developing Wails applications for Linux.
## Video tag doesn't fire "ended" event
When using a video tag, the "ended" event is not fired when the video is finished playing. This is a bug
in WebkitGTK, however you can use the following workaround to fix it:
```js
videoTag.addEventListener("timeupdate", (event) => {
if (event.target.duration - event.target.currentTime < 0.2) {
let ended = new Event("ended");
event.target.dispatchEvent(ended);
}
});
```
Source: [Lyimmi](https://github.com/Lyimmi) on the
[discussions board](https://github.com/wailsapp/wails/issues/1729#issuecomment-1212291275)

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@ -1,98 +0,0 @@
# Manual Builds
The Wails CLI does a lot of heavy lifting for the project, but sometimes it's desirable to manually build your project.
This document will discuss the different operations the CLI does and how this may be achieved in different ways.
## Build Process
When either `wails build` or `wails dev` are used, the Wails CLI performs a common build process:
- Install frontend dependencies
- Build frontend project
- Generate build assets
- Compile application
- [optional] Compress application
### Install frontend dependencies
#### CLI Steps
- If the `-s` flag is given, this step is skipped
- Checks `wails.json` to see if there is an install command in the key `frontend:install`
- If there isn't, it skips this step
- If there is, it checks if `package.json` exists in the frontend directory. If it doesn't exist, it skips this step
- An MD5 sum is generated from the `package.json` file contents
- It checks for the existence of `package.json.md5` and if it exists, will compare the contents of it (an MD5 sum)
with the one generated to see if the contents have changed. If they are the same, this step is skipped
- If `package.json.md5` does not exist, it creates it using the generated MD5 sum
- If a build is now required, or `node_modules` does not exist, or the `-f` flag is given, the install command is
executed in the frontend directory
#### Manual Steps
This step could be done from the command line or a script with `npm install`.
### Build frontend project
#### Wails CLI
- If the `-s` flag is given, this step is skipped
- Checks `wails.json` to see if there is a build command in the key `frontend:build`
- If there isn't, it skips this step
- If there is, it is executed in the frontend directory
#### Manual Steps
This step could be done from the command line or a script with `npm run build` or whatever the frontend build script is.
### Generate assets
#### Wails CLI
- If `-nopackage` flag is set, this stage is skipped
- If the `build/appicon.png` file does not exist, a default one is created
- For Windows, see [Bundling for Windows](#windows)
- If `build/windows/icon.ico` does not exist, it will create it from the `build/appicon.png` image.
##### Windows
- If `build/windows/icon.ico` does not exist, it will create it from `build/appicon.png` using icon sizes of 256, 128, 64, 48, 32 and 16. This is done using [winicon](https://github.com/leaanthony/winicon).
- If the `build/windows/<projectname>.manifest` file does not exist, it creates it from a default version.
- Compiles the application as a production build (above)
- Uses [winres](https://github.com/tc-hib/winres) to bundle the icon and manifest into a `.syso` file ready for linking.
#### Manual Steps
- Create `icon.ico` using the [winicon](https://github.com/leaanthony/winicon) CLI tool (or any other tool).
- Create / Update a `.manifest` file for your application
- Use the [winres CLI](https://github.com/tc-hib/go-winres) to generate a `.syso` file.
### Compile application
#### Wails CLI
- If the `-clean` flag is provided, the `build` directory is deleted and recreated
- For `wails dev`, the following default Go flags are used: `-tags dev -gcflags "all=-N -l"`
- For `wails build`, the following default Go flags are used: `-tags desktop,production -ldflags "-w -s"`
- On Windows, `-ldflags "-w -h -H windowsgui"`
- Additional tags passed to the CLI using `-tags` are added to the defaults
- Additional ldflags passed to the CLI using `-ldflags` are added to the defaults
- The `-o` flag is passed through
- The Go compiler specified by `-compiler` will be used for compilation
#### Manual steps
- For dev build, the minimum command would be: `go build -tags dev -gcflags "all=-N -l"`
- For production build, the minimum command would be: `go build -tags desktop,production -ldflags "-w -s -H windowsgui"`
- Ensure that you compile in the same directory as the `.syso` file
### Compress application
#### Wails CLI
- If the `-upx` flag has been given, the `upx` program will be run to compress the application with the default settings
- If `-upxflags` is also passed, these flags are used instead of the default ones
#### Manual steps
- Run `upx [flags]` manually to compress the application.

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@ -1,204 +0,0 @@
# Migrating from v1
## Overview
Wails v2 is a significant change from v1. This document aims to highlight the changes and the steps in migrating an existing project.
### Creating the Application
In v1, the main application is created using `wails.CreateApp`, bindings are added with `app.Bind`, then the
application is run using `app.Run()`.
Example:
```go title="v1"
app := wails.CreateApp(&wails.AppConfig{
Title: "MyApp",
Width: 1024,
Height: 768,
JS: js,
CSS: css,
Colour: "#131313",
})
app.Bind(basic)
app.Run()
```
In v2, there is just a single method, `wails.Run()`, that accepts [application options](../reference/options.mdx#application-options).
```go title="v2"
err := wails.Run(&options.App{
Title: "MyApp",
Width: 800,
Height: 600,
Assets: assets,
Bind: []interface{}{
basic,
},
})
```
### Binding
In v1, it was possible to bind both arbitrary functions and structs. In v2, this has been simplified to only binding structs.
The struct instances that were previously passed to the `Bind()` method in v1, are now specified in the `Bind` field of
the [application options](../reference/options.mdx#application-options):
```go title="v1"
app := wails.CreateApp(/* options */)
app.Bind(basic)
```
```go title="v2"
err := wails.Run(&options.App{
/* other options */
Bind: []interface{}{
basic,
},
})
```
In v1, bound methods were available to the frontend at `window.backend`. This has changed to `window.go`.``
### Application Lifecycle
In v1, there were 2 special methods in a bound struct: `WailsInit()` and `WailsShutdown()`. These have
been replaced with 3 lifecycle hooks as part of the [application options](../reference/options.mdx#application-options):
- [OnStartup](../reference/options.mdx#onstartup)
- [OnShutdown](../reference/options.mdx#onshutdown)
- [OnDomReady](../reference/options.mdx#ondomready)
Note: [OnDomReady](../reference/options.mdx#ondomready) replaces the `wails:ready` system event in v1.
These methods can be standard functions, but a common practice is to have them part of a struct:
```go title="v2"
basic := NewBasicApp()
err := wails.Run(&options.App{
/* Other Options */
OnStartup: basic.startup,
OnShutdown: basic.shutdown,
OnDomReady: basic.domready,
})
...
type Basic struct {
ctx context.Context
}
func (b *Basic) startup(ctx context.Context) {
b.ctx = ctx
}
...
```
### Runtime
The runtime in v2 is much richer than v1 with support for menus, window manipulation
and better dialogs. The signature of the methods has changed slightly - please refer
the the [Runtime Reference](../reference/runtime/intro.mdx).
In v1, the [runtime](../reference/runtime/intro.mdx) was available via a struct passed to `WailsInit()`.
In v2, the runtime has been moved out to its own package. Each method in the runtime takes the
`context.Context` that is passed to the [OnStartup](../reference/options.mdx#onstartup) method.
```go title="Runtime Example"
package main
import "github.com/wailsapp/wails/v2/pkg/runtime"
type Basic struct {
ctx context.Context
}
// startup is called at application startup
func (a *App) startup(ctx context.Context) {
a.ctx = ctx
runtime.LogInfo(ctx, "Application Startup called!")
}
```
### Assets
The _biggest_ change in v2 is how assets are handled.
In v1, assets were passed via 2 application options:
- `JS` - The application's Javascript
- `CSS` - The application's CSS
This meant that the responsibility of generating a single JS and CSS file was on the
developer. This essentially required the use of complicated packers such as webpack.
In v2, Wails makes no assumptions about your frontend assets, just like a webserver.
All of your application assets are passed to the application options as an `embed.FS`.
**This means there is no requirement to bundle your assets, encode images as Base64 or
attempt the dark art of bundler configuration to use custom fonts**.
At startup, Wails
will scan the given `embed.FS` for `index.html` and use its location as the root path
for all the other application assets - just like a webserver would.
Example: An application has the following project layout. All final assets are placed in the
`frontend/dist` directory:
```shell
.
├── build/
├── frontend/
│ └── dist/
│ ├── index.html
│ ├── main.js
│ ├── main.css
│ └── logo.svg
├── main.go
└── wails.json
```
Those assets may be used by the application by simply creating an `embed.FS`:
```go title="Assets Example"
//go:embed all:frontend/dist
var assets embed.FS
func main() {
err := wails.Run(&options.App{
/* Other Options */
Assets: assets,
})
}
```
Of course, bundlers can be used if you wish to. The only requirement is to pass
the final application assets directory to Wails using an `embed.FS` in the `Assets`
key of the [application options](../reference/options.mdx#application-options).
### Project Configuration
In v1, the project configuration was stored in the `project.json` file in the project root.
In v2, the project configuration is stored in the `wails.json` file in the project root.
The format of the file is slightly different. Here is a comparison:
<p align="center">
| v1 | v2 | Notes |
| ------------------ | ---------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| name | name | |
| description | | Removed |
| author / name | author / name | |
| author / email | author / email | |
| version | version | |
| binaryname | outputfilename | Changed |
| frontend / dir | | Removed |
| frontend / install | frontend:install | Changed |
| frontend / build | frontend:build | Changed |
| frontend / bridge | | Removed |
| frontend / serve | | Removed |
| tags | | Removed |
| | wailsjsdir | The directory to generate wailsjs modules |
| | assetdir | The directory of the compiled frontend assets for `dev` mode. This is normally inferred and could be left empty. |
| | reloaddirs | Comma separated list of additional directories to watch for changes and to trigger reloads in `dev` mode. This is only needed for some more advanced asset configurations. |
</p>

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@ -1,27 +0,0 @@
# Mouse Buttons
The Wails runtime intercepts mouse clicks to determine whether a frameless window needs resizing or a window needs to be moved.
It has been asked how to detect when a mouse click has occurred, because `window.onclick` doesn't report the mouse buttons correctly.
The following code shows how to detect mouse clicks:
```javascript
window.addEventListener("mousedown", handleMouseButtonDown);
function handleMouseButtonDown(event) {
if (event.button === 0) {
// left mouse button
} else if (event.button === 1) {
// middle mouse button
} else if (event.button === 2) {
// right mouse button
} else if (event.button === 3) {
// back mouse button
} else if (event.button === 4) {
// forward mouse button
} else {
// other mouse button
}
}
```
Reference: https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button

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@ -1,46 +0,0 @@
# Obfuscated Builds
Wails includes support for obfuscating your application using [garble](https://github.com/burrowers/garble).
To produce an obfuscated build, you can use the `-obfuscate` flag with the `wails build` command:
```bash
wails build -obfuscated
```
To customise the obfuscation settings, you can use the `-garbleargs` flag:
```bash
wails build -obfuscated -garbleargs "-literals -tiny -seed=myrandomseed"
```
These settings may be persisted in your [project config](../reference/project-config).
## How it works
In a standard build, all bound methods are available in the frontend under the `window.go`
variable. When these methods are called, the corresponding backend method is called using
the fully qualified function name. When using an obfuscated build, methods are bound using
an ID instead of a name. The bindings generated in the `wailsjs` directory use these IDs to
call the backend functions.
:::note
To ensure that your application will work in obfuscated mode, you must use the generated
bindings under the `wailsjs` directory in your application.
:::
## Example
Importing the "Greet" method from the bindings like this:
```js
import { Greet } from "../../wailsjs/go/main/App";
// snip
Greet("World");
```
will ensure that the method will work correctly in obfuscated mode, as the bindings will
be regenerated with IDs and the call mechanism updated.

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@ -1,11 +0,0 @@
# Overscroll
[Overscroll](https://developer.mozilla.org/en-US/docs/Web/CSS/overscroll-behavior) is the "bounce effect" you sometimes
get when you scroll beyond a page's content boundaries. This is common in mobile apps. This can be disabled using CSS:
```css
html {
height: 100%;
overflow: hidden;
}
```

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@ -1,47 +0,0 @@
# Routing
Routing is a popular way to switch views in an application. This page offers some guidance around how to do that.
## Vue
The recommended approach for routing in Vue is [Hash Mode](https://next.router.vuejs.org/guide/essentials/history-mode.html#hash-mode):
```js
import { createRouter, createWebHashHistory } from "vue-router";
const router = createRouter({
history: createWebHashHistory(),
routes: [
//...
],
});
```
## Angular
The recommended approach for routing in Angular is [HashLocationStrategy](https://codecraft.tv/courses/angular/routing/routing-strategies#_hashlocationstrategy):
```ts
RouterModule.forRoot(routes, { useHash: true });
```
## React
The recommended approach for routing in React is [HashRouter](https://reactrouter.com/en/main/router-components/hash-router):
```jsx
import { HashRouter } from "react-router-dom";
ReactDOM.render(
<HashRouter basename={"/"}>
{/* The rest of your app goes here */}
<Routes>
<Route path="/" element={<Page0 />} exact />
<Route path="/page1" element={<Page1 />} />
<Route path="/page2" element={<Page2 />} />
{/* more... */}
</Routes>
</HashRouter>,
root
);
```

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@ -1,411 +0,0 @@
# Code Signing
This is a guide on how you can sign your binaries generated with Wails on MacOS and Windows.
The guide will target CI environments, more specifically GitHub Actions.
## Windows
First off you need a code signing certificate. If you do not already have one, Microsoft's
info page lists some providers [here](https://docs.microsoft.com/en-us/windows-hardware/drivers/dashboard/get-a-code-signing-certificate).
Please note that an EV certificate is not required unless you need to write kernel-level
software such as device drivers. For signing your Wails app, a standard code signing
certificate will do just fine.
It may be a good idea to check with your certificate provider
how to sign your binaries on your local machine before targeting automated build systems, just so you know if there
are any special requirements. For instance, [here](https://www.ssl.com/how-to/using-your-code-signing-certificate/) is SSL.com's code signing guide for Windows.
If you know how to sign locally, it will be easier to
troubleshoot any potential issues in a CI environment.
For instance, SSL.com code signing certificates require the `/tr` flag for [SignTool.exe](https://docs.microsoft.com/en-us/windows/win32/seccrypto/signtool)
while other providers may only need the `/t` flag for providing the timestamping server. Popular GitHub Actions for signing
Windows binaries like [this one](https://github.com/Dana-Prajea/code-sign-action) does not support the `/tr` flag on SignTool.exe.
Therefore this guide will focus on signing our app manually with PowerShell commands, but you can use actions like the [code-sign-action](https://github.com/Dana-Prajea/code-sign-action)
Action if you prefer.
First off, let's make sure we are able to build our Wails app in our GitHub CI. Here is a small workflow template:
```yaml
name: "example"
on:
workflow_dispatch:
# This Action only starts when you go to Actions and manually run the workflow.
jobs:
package:
strategy:
matrix:
platform: [windows-latest, macos-latest]
go-version: [1.18]
runs-on: ${{ matrix.platform }}
steps:
- uses: actions/checkout@v3
- name: Install Go
uses: actions/setup-go@v2
with:
go-version: ${{ matrix.go-version }}
- name: setup node
uses: actions/setup-node@v2
with:
node-version: 14
# You may need to manually build you frontend manually here, unless you have configured frontend build and install commands in wails.json.
- name: Get Wails
run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
- name: Build Wails app
run: |
wails build
- name: upload artifacts macOS
if: matrix.platform == 'macos-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-macos
path: build/bin/*
- name: upload artifacts windows
if: matrix.platform == 'windows-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-windows
path: build/bin/*
```
Next we need to give the GitHub workflow access to our signing certificate. This is done by encoding your .pfx or .p12 certificate
into a base64 string. To do this in PowerShell, you can use the following command assuming your certificate is called 'my-cert.p12':
```PowerShell
certutil -encode .\my-cert.p12 my-cert-base64.txt
```
You should now have your .txt file with the base64 encoded certificate. It should start with _-----BEGIN CERTIFICATE-----_ and
end with _-----END CERTIFICATE-----_. Now you need to make two action secrets on GitHub. Navigate to _Settings -> Secrets -> Actions_ and create the
two following secrets:
- **WIN_SIGNING_CERT** with the contents of your base64 encoded certificate text.
- **WIN_SIGNING_CERT_PASSWORD** with the contents of your certificate password.
Now we're ready to implement the signing in our workflow using one of the two methods:
### Method 1: signing with commands
This method uses PowerShell commands to sign our app, and leaves you control over the entire signing process.
After the `"Build Wails app"` step, we can add the following step to our workflow:
```yaml
- name: Sign Windows binaries
if: matrix.platform == 'windows-latest'
run: |
echo "Creating certificate file"
New-Item -ItemType directory -Path certificate
Set-Content -Path certificate\certificate.txt -Value '${{ secrets.WIN_SIGNING_CERT }}'
certutil -decode certificate\certificate.txt certificate\certificate.pfx
echo "Signing our binaries"
& 'C:/Program Files (x86)/Windows Kits/10/bin/10.0.17763.0/x86/signtool.exe' sign /fd <signing algorithm> /t <timestamping server> /f certificate\certificate.pfx /p '${{ secrets.WIN_SIGNING_CERT_PASSWORD }}' <path to binary>
```
This script creates a new directory for your certificate file, creates the certificate file from our base64 secret, converts it to a .pfx file,
and finally signs the binary. The following variables needs to be replaced in the last line:
- **signing algorithm**: usually sha256.
- **timestamping server**: URL to the timestamping server to use with your certificate.
- **path to binary**: path to the binary you want to sign.
Given that our Wails config has `outputfilename` set to "app.exe" and that we have a certificate from SSL.com, this would be our workflow:
```yaml
name: "example"
on:
workflow_dispatch:
# This Action only starts when you go to Actions and manually run the workflow.
jobs:
package:
strategy:
matrix:
platform: [windows-latest, macos-latest]
go-version: [1.18]
runs-on: ${{ matrix.platform }}
steps:
- uses: actions/checkout@v3
- name: Install Go
uses: actions/setup-go@v2
with:
go-version: ${{ matrix.go-version }}
- name: setup node
uses: actions/setup-node@v2
with:
node-version: 14
# You may need to manually build you frontend here, unless you have configured frontend build and install commands in wails.json.
- name: Get Wails
run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
- name: Build Wails app
run: |
wails build
- name: Sign Windows binaries
if: matrix.platform == 'windows-latest'
run: |
echo "Creating certificate file"
New-Item -ItemType directory -Path certificate
Set-Content -Path certificate\certificate.txt -Value '${{ secrets.WIN_SIGNING_CERT }}'
certutil -decode certificate\certificate.txt certificate\certificate.pfx
echo "Signing our binaries"
& 'C:/Program Files (x86)/Windows Kits/10/bin/10.0.17763.0/x86/signtool.exe' sign /fd sha256 /tr http://ts.ssl.com /f certificate\certificate.pfx /p '${{ secrets.WIN_SIGNING_CERT_PASSWORD }}' .\build\bin\app.exe
- name: upload artifacts macOS
if: matrix.platform == 'macos-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-macos
path: build/bin/*
- name: upload artifacts windows
if: matrix.platform == 'windows-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-windows
path: build/bin/*
```
### Method 2: automatically signing with Action
It is possible to use a Windows code signing Action like [this](https://github.com/marketplace/actions/code-sign-a-file-with-pfx-certificate) one,
but note it requires a SHA1 hash for the certificate and a certificate name. View an example of how to configure it on the Action's [marketplace](https://github.com/marketplace/actions/code-sign-a-file-with-pfx-certificate).
---
## MacOS
First off you need your code signing certificate from Apple. If you do not have one, a simple Google search will help you acquire one.
Once you have your certificate, you need to export it and encode it to base64. [This tutorial](https://localazy.com/blog/how-to-automatically-sign-macos-apps-using-github-actions)
shows you how to do that in an easy manner. Once you have exported your .p12 certificate file, you can encode it to base64 as seen in the tutorial with the following command:
```bash
base64 Certificates.p12 | pbcopy
```
Now you're ready to create some GitHub project secrets, just as with Windows:
- **APPLE_DEVELOPER_CERTIFICATE_P12_BASE64** with the contents of your newly copied base64 certificate.
- **APPLE_DEVELOPER_CERTIFICATE_PASSWORD** with the contents of your certificate password.
- **APPLE_PASSWORD** with the contents of an App-Specific password to your Apple-ID account which you can generate [here](https://appleid.apple.com/account/manage).
Let's make sure we are able to build our Wails app in our GitHub Action workflow. Here is a small template:
```yaml
name: "example"
on:
workflow_dispatch:
# This Action only starts when you go to Actions and manually run the workflow.
jobs:
package:
strategy:
matrix:
platform: [windows-latest, macos-latest]
go-version: [1.18]
runs-on: ${{ matrix.platform }}
steps:
- uses: actions/checkout@v3
- name: Install Go
uses: actions/setup-go@v2
with:
go-version: ${{ matrix.go-version }}
- name: setup node
uses: actions/setup-node@v2
with:
node-version: 14
# You may need to manually build you frontend here, unless you have configured frontend build and install commands in wails.json.
- name: Get Wails
run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
- name: Build Wails app
run: |
wails build
- name: upload artifacts macOS
if: matrix.platform == 'macos-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-macos
path: build/bin/*
- name: upload artifacts windows
if: matrix.platform == 'windows-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-windows
path: build/bin/*
```
For code signing on macOS, [gon](https://github.com/mitchellh/gon) is a very handy tool for code signing and communicating with Apple servers, also written in Go, and
will be used in this guide.
After the `Build Wails app` step, add the following to the workflow:
```yaml
- name: MacOS download gon for code signing and app notarization
if: matrix.platform == 'macos-latest'
run: |
brew install mitchellh/gon/gon
```
Now we need to configure some gon config files in our `build/darwin` directory:
1. gon-sign.json:
```json
{
"source": ["./build/bin/app.app"],
"bundle_id": "app.myapp",
"apple_id": {
"username": "my-appleid@email.com",
"password": "@env:APPLE_PASSWORD"
},
"sign": {
"application_identity": "Developer ID Application: My Name"
}
}
```
Where `source` is your Wails binary, `bundle_id` is your bundle ID, `apple_id` contains your Apple ID username and App-Specific password
which you created earlier, and `sign.application_identity` is your identity which you can find by running the following command:
```bash
security find-identity -v -p codesigning
```
2. entitlements.plist:
```plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.app-sandbox</key>
<true/>
<key>com.apple.security.network.client</key>
<true/>
<key>com.apple.security.network.server</key>
<true/>
<key>com.apple.security.files.user-selected.read-write</key>
<true/>
<key>com.apple.security.files.downloads.read-write</key>
<true/>
</dict>
</plist>
```
In this file you configure the entitlements you need for you app, e.g. camera permissions if your app uses the camera. Read more about entitlements [here](https://developer.apple.com/documentation/bundleresources/entitlements).
Make sure you have updated your `Info.plist` file with the same bundle ID as you entered in `gon-sign.json`.
Here's an example `Info.plist` file:
```plist
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0"><dict>
<key>CFBundlePackageType</key><string>APPL</string>
<key>CFBundleName</key><string>MyApp</string>
<key>CFBundleExecutable</key><string>app</string>
<key>CFBundleIdentifier</key><string>app.myapp</string>
<key>CFBundleVersion</key><string>0.1.0</string>
<key>CFBundleGetInfoString</key><string>My app is cool and nice and chill and</string>
<key>CFBundleShortVersionString</key><string>0.1.0</string>
<key>CFBundleIconFile</key><string>iconfile</string>
<key>LSMinimumSystemVersion</key><string>10.13.0</string>
<key>NSHighResolutionCapable</key><string>true</string>
<key>LSApplicationCategoryType</key><string>public.app-category.utilities</string>
<key>NSHumanReadableCopyright</key><string>© Me</string>
</dict></plist>
```
Now we're ready to add the signing step in our workflow after building the Wails app:
```yaml
- name: Import Code-Signing Certificates for macOS
if: matrix.platform == 'macos-latest'
uses: Apple-Actions/import-codesign-certs@v1
with:
# The certificates in a PKCS12 file encoded as a base64 string
p12-file-base64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
# The password used to import the PKCS12 file.
p12-password: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
- name: Sign our macOS binary
if: matrix.platform == 'macos-latest'
run: |
echo "Signing Package"
gon -log-level=info ./build/darwin/gon-sign.json
```
Please note that signing binaries with Apple could take anywhere from minutes to hours.
## Combined workflow file:
Here is our GitHub workflow file with Windows + macOS combined:
```yaml
name: "example combined"
on:
workflow_dispatch:
# This Action only starts when you go to Actions and manually run the workflow.
jobs:
package:
strategy:
matrix:
platform: [windows-latest, macos-latest]
go-version: [1.18]
runs-on: ${{ matrix.platform }}
steps:
- uses: actions/checkout@v3
- name: Install Go
uses: actions/setup-go@v2
with:
go-version: ${{ matrix.go-version }}
- name: setup node
uses: actions/setup-node@v2
with:
node-version: 14
# You may need to manually build you frontend here, unless you have configured frontend build and install commands in wails.json.
- name: Get Wails
run: go install github.com/wailsapp/wails/v2/cmd/wails@latest
- name: Build Wails app
run: |
wails build
- name: MacOS download gon for code signing and app notarization
if: matrix.platform == 'macos-latest'
run: |
brew install mitchellh/gon/gon
- name: Import Code-Signing Certificates for macOS
if: matrix.platform == 'macos-latest'
uses: Apple-Actions/import-codesign-certs@v1
with:
# The certificates in a PKCS12 file encoded as a base64 string
p12-file-base64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
# The password used to import the PKCS12 file.
p12-password: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
- name: Sign our macOS binary
if: matrix.platform == 'macos-latest'
run: |
echo "Signing Package"
gon -log-level=info ./build/darwin/gon-sign.json
- name: Sign Windows binaries
if: matrix.platform == 'windows-latest'
run: |
echo "Creating certificate file"
New-Item -ItemType directory -Path certificate
Set-Content -Path certificate\certificate.txt -Value '${{ secrets.WIN_SIGNING_CERT }}'
certutil -decode certificate\certificate.txt certificate\certificate.pfx
echo "Signing our binaries"
& 'C:/Program Files (x86)/Windows Kits/10/bin/10.0.17763.0/x86/signtool.exe' sign /fd sha256 /tr http://ts.ssl.com /f certificate\certificate.pfx /p '${{ secrets.WIN_SIGNING_CERT_PASSWORD }}' .\build\bin\Monitor.exe
- name: upload artifacts macOS
if: matrix.platform == 'macos-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-macos
path: build/bin/*
- name: upload artifacts windows
if: matrix.platform == 'windows-latest'
uses: actions/upload-artifact@v2
with:
name: wails-binaries-windows
path: build/bin/*
```
# End notes
This guide inspired by the RiftShare project and its workflow, which is highly recommended to check out [here](https://github.com/achhabra2/riftshare/blob/main/.github/workflows/build.yaml).

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@ -1,99 +0,0 @@
# Templates
Wails generates projects from pre-created templates. In v1, this was a difficult to maintain set of projects that were
subject to going out of date. In v2, to empower the community, a couple of new features have been added for templates:
- Ability to generate projects from [Remote Templates](../reference/cli.mdx#remote-templates)
- Tooling to help create your own templates
## Creating Templates
To create a template, you can use the `wails generate template` command. To generate a default template, run:
`wails generate template -name mytemplate `
This creates the directory "mytemplate" with default files:
```shell title=mytemplate/
.
|-- NEXTSTEPS.md
|-- README.md
|-- app.tmpl.go
|-- frontend
| `-- dist
| |-- assets
| | |-- fonts
| | | |-- OFL.txt
| | | `-- nunito-v16-latin-regular.woff2
| | `-- images
| | `-- logo-dark.svg
| |-- index.html
| |-- main.css
| `-- main.js
|-- go.mod.tmpl
|-- main.tmpl.go
|-- template.json
`-- wails.tmpl.json
```
### Template Overview
The default template consists of the following files and directories:
| Filename / Dir | Description |
| --------------- | -------------------------------------------- |
| NEXTSTEPS.md | Instructions on how to complete the template |
| README.md | The README published with the template |
| app.tmpl.go | `app.go` template file |
| frontend/ | The directory containing frontend assets |
| go.mod.tmpl | `go.mod` template file |
| main.tmpl.go | `main.go` template file |
| template.json | The template metadata |
| wails.tmpl.json | `wails.json` template file |
At this point it is advisable to follow the steps in `NEXTSTEPS.md`.
## Creating a Template from an Existing Project
It's possible to create a template from an existing frontend project by passing the path to the project when generating
the template. We will now walk through how to create a Vue 3 template:
- Install the vue cli: `npm install -g @vue/cli`
- Create the default project: `vue create vue3-base`
- Select `Default (Vue 3) ([Vue 3] babel, eslint)`
- After the project has been generated, run:
```shell
> wails generate template -name wails-vue3-template -frontend .\vue3-base\
Extracting base template files...
Migrating existing project files to frontend directory...
Updating package.json data...
Renaming package.json -> package.tmpl.json...
Updating package-lock.json data...
Renaming package-lock.json -> package-lock.tmpl.json...
```
- The template may now be customised as specified in the `NEXTSTEPS.md` file
- Once the files are ready, it can be tested by running: `wails init -n my-vue3-project -t .\wails-vue3-template\`
- To test the new project, run: `cd my-vue3-project` then `wails build`
- Once the project has compiled, run it: `.\build\bin\my-vue3-project.exe`
- You should have a fully functioning Vue3 application:
```mdx-code-block
<div className="text--center">
<img
src={require("@site/static/img/vue3-template.png").default}
width="50%"
/>
</div>
```
## Publishing Templates
Publishing a template is simply pushing the files to GitHub. The following best practice is encouraged:
- Remove any unwanted files and directories (such as `.git`) from your frontend directory
- Ensure that `template.json` is complete, especially `helpurl`
- Push the files to GitHub
- Create a PR on the [Community Templates](../community/templates.mdx) page
- Announce the template on the [Template Announcement](https://github.com/wailsapp/wails/discussions/825) discussion board

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@ -1,168 +0,0 @@
# Troubleshooting
An assortment of troubleshooting tips.
## The `wails` command appears to be missing?
If your system is reporting that the `wails` command is missing, make sure you have followed the Go installation guide
correctly. Normally, it means that the `go/bin` directory in your User's home directory is not in the `PATH` environment
variable. You will also normally need to close and reopen any open command prompts so that changes to the environment
made by the installer are reflected at the command prompt.
## My application is displaying a white/blank screen
Check that your application includes the assets from the correct directory. In your `main.go` file, you will have
something similar to the following code:
```go
//go:embed all:frontend/dist
var assets embed.FS
```
Check that `frontend/dist` contains your application assets.
### Mac
If this happens on Mac, try adding the following to your `Info.plist`:
```xml
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsLocalNetworking</key>
<true/>
</dict>
```
Reference: https://github.com/wailsapp/wails/issues/1504#issuecomment-1174317433
## Mac application not valid
If your built application looks like this in finder:
```mdx-code-block
<p className="text--center">
<img
src={
require("@site/static/img/troubleshooting/invalid_mac_app.png").default
}
/>
</p>
```
it's likely that your application's `info.plist` is invalid. Update the file in `build/<yourapp>.app/Contents/info.plist`
and check if the data is valid, EG check the binary name is correct. To persist the changes, copy the file back to
the `build/darwin` directory.
## Cannot call backend method from frontend with variadic arguments
If you have a backend method defined with variadic parameters, eg:
```go
func (a *App) TestFunc(msg string, args ...interface{}) error {
// Code
}
```
calling this method from the frontend like this will fail:
```js
var msg = "Hello: ";
var args = ["Go", "JS"];
window.go.main.App.TestFunc(msg, ...args)
.then((result) => {
//do things here
})
.catch((error) => {
//handle error
});
```
Workaround:
```js
var msg = "Hello ";
var args = ["Go", "JS"];
window.go.main.App.TestFunc(msg, args)
.then((result) => {
//without the 3 dots
//do things here
})
.catch((error) => {
//handle error
});
```
Credit: https://github.com/wailsapp/wails/issues/1186
## I'm having getting proxy errors when trying to install Wails
If you are getting errors like this:
```
"https://proxy.golang.org/github.com/wailsapp/wails/cmd/wails/@v/list": dial tcp 172.217.163.49:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
```
it's probably because the official Go Proxy is being blocked (Users in China have reported this).
The solution is to set up the proxy manually, eg:
```
go env -w GO111MODULE=on
go env -w GOPROXY=https://goproxy.cn,direct
```
Source: https://github.com/wailsapp/wails/issues/1233
## The generated Typescript doesn't have the correct types
Sometimes the generated Typescript doesn't have the correct types. To mitigate this,
it is possible to specify what types should be generated using the `ts_type` struct tag. For
more details, please read [this](https://github.com/tkrajina/typescriptify-golang-structs#custom-types).
## When I navigate away from `index.html`, I am unable to call methods on the frontend
If you navigate away from `index.html` to a new html file, the context will be lost. This can be fixed by adding
the following imports to the `<head>` section of any new page you navigate to:
```html
<head>
<script src="/wails/ipc.js"></script>
<script src="/wails/runtime.js"></script>
</head>
```
Source: https://github.com/wailsapp/wails/discussions/1512
## I get `too many open files` errors on my Mac when I run `wails dev`
By default, macOS will only allow you to open a maximum of 256 files. This can affect the `wails dev` command.
This limit can be increased by running: `ulimit -n 1024` in the terminal.
FSNotify is [looking to move to Apple's fsevents](https://github.com/fsnotify/fsnotify/issues/11) for Mac.
If this isn't completed soon, we will create our own implementation, tracked [here](https://github.com/wailsapp/wails/issues/1733).
## My Mac app gives me weird compilation errors
A few users have reported seeing compilation errors such as the following:
```shell
# github.com/wailsapp/wails/v2/internal/frontend/desktop/darwin
In file included from ../../pkg/mod/github.com/wailsapp/wails/v2@v2.0.0-beta.44.2/internal/frontend/desktop/darwin/callbacks.go:9:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:12:
/Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSBundle.h:91:143: error: function does not return NSString
- (NSAttributedString *)localizedAttributedStringForKey:(NSString *)key value:(nullable NSString *)value table:(nullable NSString *)tableName NS_FORMAT_ARGUMENT(1) NS_REFINED_FOR_SWIFT API_AVAILABLE(macos(12.0), ios(15.0), watchos(8.0), tvos(15.0));
~~~~~~~~~~~~~~ ^ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:103:48: note: expanded from macro 'NS_FORMAT_ARGUMENT'
#define NS_FORMAT_ARGUMENT(A) __attribute__ ((format_arg(A)))
```
This is _normally_ due to a mismatch with the OS version you are running and the version of the XCode Command Line Tools
installed. If you see an error like this, try upgrading your XCode Command Line Tools to the latest version.
Source: https://github.com/wailsapp/wails/issues/1806
## Cannot start service: Host version "x.x.x does not match binary version "x.x.x"
It's preferable to add `frontend/node_modules` and `frontend/package-lock.json` to your `.gitignore`. Otherwise when opening your repository on another machine
that may have different versions of Node installed, you may not be able to run your application.
If this does happen, simply delete `frontend/node_modules` and `frontend/package-lock.json` and run your `wails build` or `wails dev` command again.

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@ -1,85 +0,0 @@
# Visual Studio Code
This page is for miscellaneous tips and tricks when using Visual Studio Code with Wails.
## Vetur Configuration
Many thanks to [@Lyimmi](https://github.com/Lyimmi) for this tip. Originally posted
[here](https://github.com/wailsapp/wails/issues/1791#issuecomment-1228158349).
Vetur is a popular plugin for Visual Studio Code that provides syntax highlighting and code completion
for Vue projects. When loading a Wails project in VSCode, Vetur will throw an error as it is expecting
to find the frontend project in the root directory. To fix this, you can do the following:
Create a file named `vetur.config.js` in the project's root.
```javascript
// vetur.config.js
/** @type {import('vls').VeturConfig} */
module.exports = {
// **optional** default: `{}`
// override vscode settings
// Notice: It only affects the settings used by Vetur.
settings: {
"vetur.useWorkspaceDependencies": true,
"vetur.experimental.templateInterpolationService": true
},
// **optional** default: `[{ root: './' }]`
// support monorepos
projects: [
{
// **required**
// Where is your project?
// It is relative to `vetur.config.js`.
// root: './packages/repo1',
root: './frontend',
// **optional** default: `'package.json'`
// Where is `package.json` in the project?
// We use it to determine the version of vue.
// It is relative to root property.
package: './package.json',
// **optional**
// Where is TypeScript config file in the project?
// It is relative to root property.
tsconfig: './tsconfig.json',
// **optional** default: `'./.vscode/vetur/snippets'`
// Where is vetur custom snippets folders?
snippetFolder: './.vscode/vetur/snippets',
// **optional** default: `[]`
// Register globally Vue component glob.
// If you set it, you can get completion by that components.
// It is relative to root property.
// Notice: It won't actually do it. You need to use `require.context` or `Vue.component`
globalComponents: [
'./src/components/**/*.vue'
]
}
]
}
```
Next, configure `frontend/tsconfig.json`:
```javascript
{
"compilerOptions": {
"module": "system",
"noImplicitAny": true,
"removeComments": true,
"preserveConstEnums": true,
"sourceMap": true,
"outFile": "../../built/local/tsc.js",
"allowJs": true
},
"exclude": [
"node_modules",
"**/*.spec.ts"
],
"include": [
"src/**/*",
"wailsjs/**/*.ts"
]
}
```
This should enable you to now use Vetur as expected.

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@ -1,60 +0,0 @@
# NSIS installer
```mdx-code-block
<p style={{ "text-align": "center" }}>
<img
src={require("@site/static/img/nsis.webp").default}
style={{ "max-width": "50%" }}
/>
<br />
</p>
```
Wails supports generating Windows installers using the [NSIS installer](https://nsis.sourceforge.io/).
## Installing NSIS
### Windows
The installer is available on the [NSIS Download](https://nsis.sourceforge.io/Download) page.
If you use the chocolatey package manager, run the following script:
```
choco install nsis
```
If you install NSIS manually, you need to add the _Bin_ folder, which contains `makensis.exe`, in your NSIS installation to your path.
[Here](https://www.architectryan.com/2018/03/17/add-to-the-path-on-windows-10/) is a good tutorial on how to add to path on Windows.
### Linux
The `nsis` package should be available through your distribution's package manager.
### MacOS
NSIS is available to install through homebrew: `brew install nsis`.
## Generating the installer
When a new project is created, Wails generates the NSIS configuration files in `build/windows/installer`. The config
data is read from `installer/info.json` and that is configured to use the project's `wails.json` Info section:
```json
// ...
"Info": {
"companyName": "My Company Name",
"productName": "Wails Vite",
"productVersion": "1.0.0",
"copyright": "Copyright.........",
"comments": "Built using Wails (https://wails.io)"
},
```
To generate an installer for your application, use the `-nsis` flag with `wails build`:
```
wails build -nsis
```
The installer will now be available in the `build/bin` directory.

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@ -1,71 +0,0 @@
# Windows
This page has miscellaneous guides related to developing Wails applications for Windows.
## Handling the WebView2 Runtime Dependency
Wails applications built for Windows have a runtime requirement on the Microsoft [WebView2 Runtime](https://developer.microsoft.com/en-us/microsoft-edge/webview2/).
Windows 11 will have this installed by default, but some machines won't. Wails offers an easy approach to dealing with this dependency.
By using the `-webview2` flag when building, you can decide what your application will do when a suitable runtime is not detected (including if the installed runtime is too old).
The four options are:
1. Download
2. Embed
3. Browser
4. Error
### Download
This option will prompt the user that no suitable runtime has been found and then offer to download and run the official
bootstrapper from Microsoft's WebView2 site. If the user proceeds, the official bootstrapper will be downloaded and run.
### Embed
This option embeds the official bootstrapper within the application. If no suitable runtime has been found, the
application will offer to run the bootstrapper. This adds ~150k to the binary size.
### Browser
This option will prompt the user that no suitable runtime has been found and then offer to open a browser to the official
WebView2 page where the bootstrapper can be downloaded and installed. The application will then exit, leaving the installation
up to the user.
### Error
If no suitable runtime is found, an error is given to the user and no further action taken.
## Fixed version runtime
Another way of dealing with webview2 dependency is shipping it yourself.
You can download [fixed version runtime](https://developer.microsoft.com/microsoft-edge/webview2/#download-section) and bundle or download it with your application.
Also, you should specify path to fixed version of webview2 runtime in the `windows.Options` structure when launching wails.
```go
wails.Run(&options.App{
Windows: &windows.Options{
WebviewBrowserPath: "",
},
})
```
Note: When `WebviewBrowserPath` is specified, `error` strategy will be forced in case of minimal required version
mismatch or invalid path to a runtime.
## Spawning other programs
When spawning other programs, such as scripts, you will see the window appear on the screen. To hide the window,
you can use the following code:
```go
cmd := exec.Command("your_script.exe")
cmd.SysProcAttr = &syscall.SysProcAttr{
HideWindow: true,
CreationFlags: 0x08000000,
}
cmd.Start()
```
Solution provided by [sithembiso](https://github.com/sithembiso) on the
[discussions board](https://github.com/wailsapp/wails/discussions/1734#discussioncomment-3386172).

View File

@ -1,410 +0,0 @@
---
sidebar_position: 20
---
# How does it work?
A Wails application is a standard Go application, with a webkit frontend. The Go part of the application consists of the
application code and a runtime library that provides a number of useful operations, like controlling the application
window. The frontend is a webkit window that will display the frontend assets. Also available to the frontend is a Javascript
version of the runtime library. Finally, it is possible to bind Go methods to the frontend, and these will appear as
Javascript methods that can be called, just as if they were local Javascript methods.
```mdx-code-block
<div className="text--center">
<img src={require("@site/static/img/architecture.webp").default} style={{"width":"75%", "max-width":"800px"}} />
</div>
```
## The Main Application
### Overview
The main application consists of a single call to `wails.Run()`. It accepts the
application configuration which describes the size of the application window, the window title,
what assets to use, etc. A basic application might look like this:
```go title="main.go"
package main
import (
"embed"
"log"
"github.com/wailsapp/wails/v2"
"github.com/wailsapp/wails/v2/pkg/options"
)
//go:embed all:frontend/dist
var assets embed.FS
func main() {
app := &App{}
err := wails.Run(&options.App{
Title: "Basic Demo",
Width: 1024,
Height: 768,
Assets: &assets,
OnStartup: app.startup,
OnShutdown: app.shutdown,
Bind: []interface{}{
app,
},
})
if err != nil {
log.Fatal(err)
}
}
type App struct {
ctx context.Context
}
func (b *App) startup(ctx context.Context) {
b.ctx = ctx
}
func (b *App) shutdown(ctx context.Context) {}
func (b *App) Greet(name string) string {
return fmt.Sprintf("Hello %s!", name)
}
```
### Options rundown
This example has the following options set:
- `Title` - The text that should appear in the window's title bar
- `Width` & `Height` - The dimensions of the window
- `Assets` - The application's frontend assets
- `OnStartup` - A callback for when the window is created and is about to start loading the frontend assets
- `OnShutdown` - A callback for when the application is about to quit
- `Bind` - A slice of struct instances that we wish to expose to the frontend
A full list of application options can be found in the [Options Reference](reference/options).
#### Assets
The `Assets` option is mandatory as you can't have a Wails application without frontend assets. Those assets can be
any files you would expect to find in a web application - html, js, css, svg, png, etc. **There is no requirement to
generate asset bundles** - plain files will do. When the application starts, it will attempt to load `index.html`
from your assets and the frontend will essentially work as a browser from that point on. It is worth noting that
there is no requirement on where in the `embed.FS` the files live. It is likely that the embed path uses a nested
directory relative to your main application code, such as `frontend/dist`:
```go title="main.go"
//go:embed all:frontend/dist
var assets embed.FS
```
At startup, Wails will iterate the embedded files looking for the directory containing `index.html`. All other assets will be loaded relative
to this directory.
As production binaries use the files contained in `embed.FS`, there are no external files required to be shipped with
the application.
When running in development mode using the `wails dev` command, the assets are loaded off disk, and any changes result
in a "live reload". The location of the assets will be inferred from the `embed.FS`.
More details can be found in the [Application Development Guide](guides/application-development.mdx).
#### Application Lifecycle Callbacks
Just before the frontend is about to load `index.html`, a callback is made to the function provided in [OnStartup](reference/options.mdx#onstartup).
A standard Go context is passed to this method. This context is required when calling the runtime so a standard pattern is to save
a reference to in this method. Just before the application shuts down, the [OnShutdown](reference/options.mdx#onshutdown) callback is called in the same way,
again with the context. There is also an [OnDomReady](reference/options.mdx#ondomready) callback for when the frontend
has completed loading all assets in `index.html` and is equivalent of the [`body onload`](https://www.w3schools.com/jsref/event_onload.asp) event in Javascript.
It is also possible to hook into the window close (or application quit) event by setting the
option [OnBeforeClose](reference/options.mdx#onbeforeclose).
#### Method Binding
The `Bind` option is one of the most important options in a Wails application. It specifies which struct methods
to expose to the frontend. Think of structs like "controllers" in a traditional web application. When the application
starts, it examines the struct instances listed in the `Bind` field in the options, determines which methods are
public (starts with an uppercase letter) and will generate Javascript versions of those methods that can be called
by the frontend code.
:::info Note
Wails requires that you pass in an _instance_ of the struct for it to bind it correctly
:::
In this example, we create a new `App` instance and then add this instance to the `Bind` option in `wails.Run`:
```go {16,24} title="main.go"
package main
import (
"embed"
"log"
"github.com/wailsapp/wails/v2"
"github.com/wailsapp/wails/v2/pkg/options"
)
//go:embed all:frontend/dist
var assets embed.FS
func main() {
app := &App{}
err := wails.Run(&options.App{
Title: "Basic Demo",
Width: 1024,
Height: 768,
Assets: &assets,
Bind: []interface{}{
app,
},
})
if err != nil {
log.Fatal(err)
}
}
type App struct {
ctx context.Context
}
func (a *App) Greet(name string) string {
return fmt.Sprintf("Hello %s!", name)
}
```
You may bind as many structs as you like. Just make sure you create an instance of it and pass it in `Bind`:
```go {8-10}
//...
err := wails.Run(&options.App{
Title: "Basic Demo",
Width: 1024,
Height: 768,
Assets: &assets,
Bind: []interface{}{
app,
&mystruct1{},
&mystruct2{},
},
})
```
When you run `wails dev` (or `wails generate module`), a frontend module will be generated containing the following:
- Javascript bindings for all bound methods
- Typescript declarations for all bound methods
- Typescript definitions for all Go structs used as inputs or outputs by the bound methods
This makes it incredibly simple to call Go code from the frontend, using the same strongly typed datastructures.
## The Frontend
### Overview
The frontend is a collection of files rendered by webkit. It's like a browser and webserver in one.
There is virtually[^1] no limit to which frameworks or libraries you can use. The main points of interaction between
the frontend and your Go code are:
- Calling bound Go methods
- Calling runtime methods
[^1]:
There is a very small subset of libraries that use features unsupported in WebViews. There are often alternatives and
workarounds for such cases.
### Calling bound Go methods
When you run your application with `wails dev`, it will automatically generate Javascript bindings for your structs in a
directory called `wailsjs/go` (You can also do this by running `wails generate module`). The generated files mirror the
package names in your application. In the example above, we bind `app`, which has one public method `Greet`. This will
lead to the generation of the following files:
```bash
wailsjs
└─go
└─main
├─App.d.ts
└─App.js
```
Here we can see that there is a `main` package that contains the Javascript bindings for the bound `App` struct, as well
as the Typescript declaration file for those methods. To call `Greet` from our frontend, we simply import the method and
call it like a regular Javascript function:
```javascript
// ...
import { Greet } from "../wailsjs/go/main/App";
function doGreeting(name) {
Greet(name).then((result) => {
// Do something with result
});
}
```
The Typescript declaration file gives you the correct types for the bound methods:
```ts
export function Greet(arg1: string): Promise<string>;
```
The generated methods return a Promise. A successful call will result in the first return value from the Go call to be passed
to the `resolve` handler. An unsuccessful call is when a Go method that has an error type as it's second return value,
passes an error instance back to the caller. This is passed back via the `reject` handler.
In the example above, `Greet` only returns a `string` so the Javascript call will never reject - unless invalid data
is passed to it.
All data types are correctly translated between Go and Javascript. Even structs. If you return a struct from a Go call,
it will be returned to your frontend as a Javascript class.
:::info Note
Struct fields *must* have a valid `json` tag to be included in the generated Typescript.
Anonymous nested structs are not supported at this time.
:::
It is possible to send structs back to Go. Any Javascript map/class passed as an argument that
is expecting a struct, will be converted to that struct type. To make this process a lot easier, in `dev` mode,
a TypeScript module is generated, defining all the struct types used in bound methods. Using this module, it's possible
to construct and send native Javascript objects to the Go code.
There is also support for Go methods that use structs in their signature. All Go structs
specified by a bound method (either as parameters or return types) will have Typescript versions auto
generated as part of the Go code wrapper module. Using these, it's possible to share the same data
model between Go and Javascript.
Example: We update our `Greet` method to accept a `Person` instead of a string:
```go title="main.go"
type Person struct {
Name string `json:"name"`
Age uint8 `json:"age"`
Address *Address `json:"address"`
}
type Address struct {
Street string `json:"street"`
Postcode string `json:"postcode"`
}
func (a *App) Greet(p Person) string {
return fmt.Sprintf("Hello %s (Age: %d)!", p.Name, p.Age)
}
```
The `wailsjs/go/main/App.js` file will still have the following code:
```js title="App.js"
export function Greet(arg1) {
return window["go"]["main"]["App"]["Greet"](arg1);
}
```
But the `wailsjs/go/main/App.d.ts` file will be updated with the following code:
```ts title="App.d.ts"
import { main } from "../models";
export function Greet(arg1: main.Person): Promise<string>;
```
As we can see, the "main" namespace is imported from a new "models.ts" file. This file contains all the struct definitions
used by our bound methods. In this example, this is a `Person` struct. If we look at `models.ts`, we can see how the models
are defined:
```ts title="models.ts"
export namespace main {
export class Address {
street: string;
postcode: string;
static createFrom(source: any = {}) {
return new Address(source);
}
constructor(source: any = {}) {
if ("string" === typeof source) source = JSON.parse(source);
this.street = source["street"];
this.postcode = source["postcode"];
}
}
export class Person {
name: string;
age: number;
address?: Address;
static createFrom(source: any = {}) {
return new Person(source);
}
constructor(source: any = {}) {
if ("string" === typeof source) source = JSON.parse(source);
this.name = source["name"];
this.age = source["age"];
this.address = this.convertValues(source["address"], Address);
}
convertValues(a: any, classs: any, asMap: boolean = false): any {
if (!a) {
return a;
}
if (a.slice) {
return (a as any[]).map((elem) => this.convertValues(elem, classs));
} else if ("object" === typeof a) {
if (asMap) {
for (const key of Object.keys(a)) {
a[key] = new classs(a[key]);
}
return a;
}
return new classs(a);
}
return a;
}
}
}
```
So long as you have TypeScript as part of your frontend build configuration, you can use these models in
the following way:
```js title="mycode.js"
import { Greet } from "../wailsjs/go/main/App";
import { main } from "../wailsjs/go/models";
function generate() {
let person = new main.Person();
person.name = "Peter";
person.age = 27;
Greet(person).then((result) => {
console.log(result);
});
}
```
The combination of generated bindings and TypeScript models makes for a powerful development environment.
More information on Binding can be found in the [Binding Methods](guides/application-development.mdx#binding-methods)
section of the [Application Development Guide](guides/application-development.mdx).
### Calling runtime methods
The Javascript runtime is located at `window.runtime` and contains many methods to do various
tasks such as emit an event or perform logging operations:
```js title="mycode.js"
window.runtime.EventsEmit("my-event", 1);
```
More details about the JS runtime can be found in the [Runtime Reference](reference/runtime/intro).

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# Introduction
Wails is a project that enables you to write desktop apps using Go and web technologies.
Consider it a lightweight and fast Electron alternative for Go. You can easily build applications with the flexibility
and power of Go, combined with a rich, modern frontend.
### Features
- Native Menus, Dialogs, Theming and Translucency
- Windows, macOS and linux support
- Built in templates for Svelte, React, Preact, Vue, Lit and Vanilla JS
- Easily call Go methods from Javascript
- Automatic Go struct to Typescript model generation
- No CGO or external DLLs required on Windows
- Live development mode using the power of [Vite](https://vitejs.dev/)
- Powerful CLI to easily Create, Build and Package applications
- A rich [runtime library](/docs/reference/runtime/intro)
- Applications built with Wails are Apple & Microsoft Store compliant
This is [varly](https://varly.app) - a desktop application for
MacOS & Windows written using Wails. Not only does it look great, it uses native menus and translucency - everything
you'd expect from a modern native app.
```mdx-code-block
<p class="text--center">
<a href="https://varly.app/">
<img
src={require("@site/static/img/showcase/varly2.webp").default}
style={{ width: "75%", "max-width": "800px" }}
/>
</a>
</p>
```
### Quick Start Templates
Wails comes with a number of pre-configured templates that allow you to get your application up and running quickly.
There are templates for the following frameworks: Svelte, React, Vue, Preact, Lit and Vanilla. There are both Javascript
and Typescript versions for each template.
### Native Elements
Wails uses a purpose built library for handling native elements such as Window, Menus, Dialogs, etc, so you can build
good-looking, feature rich desktop applications.
**It does not embed a browser**, so it is resource efficient. Instead, it uses the native rendering engine for the
platform. On Windows, this is the new Microsoft Webview2 library, built on Chromium.
### Go & Javascript Interoperability
Wails automatically makes your Go methods available to Javascript, so you can call them by name from your frontend!
It even generates Typescript models for the structs used by your Go methods, so you can pass the same data structures
between Go and Javascript.
### Runtime Library
Wails provides a runtime library, for both Go and Javascript, that handles a lot of the things modern applications need,
like Eventing, Logging, Dialogs, etc.
### Live Development Experience
#### Automatic Rebuilds
When you run your application in "dev" mode, Wails will build your application as a native desktop application, but will
read your assets from disk. It will detect any changes to your Go code and automatically rebuild and relaunch your
application.
#### Automatic Reloads
When changes to your application assets are detected, your running application will "reload", reflecting your changes
almost immediately.
#### Develop your application in a Browser
If you prefer to debug and develop in a browser then Wails has you covered. The running application also has a webserver
that will run your application in any browser that connects to it. It will even refresh when your assets change on disk.
### Production-ready Native Binaries
When you're ready to do the final build of your application, the CLI will compile it down to a single executable, with
all the assets bundled into it. On Windows and MacOS, it is possible to create a native package for distribution. The
assets used in packaging (icon, info.plist, manifest file, etc) are part of your project and may be customised, giving
you total control over how your applications are built.
### Tooling
The Wails CLI provides a hassle-free way to generate, build and bundle your applications. It will do the heavy lifting
of creating icons, compiling your application with optimal settings and delivering a distributable, production ready
binary. Choose from a number of starter templates to get up and running quickly!

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{
"label": "Reference",
"position": 40
}

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sidebar_position: 2
---
# CLI
The Wails CLI has a number of commands that are used for managing your projects. All commands are run in the following way:
`wails <command> <flags>`
## init
`wails init` is used for generating projects.
| Flag | Description | Default |
| :----------------- | :---------------------------------------------------------------------------------------------------------------------- | :-----------------: |
| -n "project name" | Name of the project. **Mandatory**. | |
| -d "project dir" | Project directory to create | Name of the project |
| -g | Initialise git repository | |
| -l | List available project templates | |
| -q | Suppress output to console | |
| -t "template name" | The project template to use. This can be the name of a default template or a URL to a remote template hosted on github. | vanilla |
| -ide | Generate IDE project files | |
| -f | Force build application | false |
Example:
`wails init -n test -d mytestproject -g -ide vscode -q`
This will generate a a project called "test" in the "mytestproject" directory, initialise git,
generate vscode project files and do so silently.
More information on using IDEs with Wails can be found [here](../guides/ides.mdx).
### Remote Templates
Remote templates (hosted on GitHub) are supported and can be installed by using the template's project URL.
Example:
`wails init -n test -t https://github.com/leaanthony/testtemplate[@v1.0.0]`
A list of community maintained templates can be found [here](../community/templates.mdx)
:::warning Attention
**The Wails project does not maintain, is not responsible nor liable for 3rd party templates!**
If you are unsure about a template, inspect `package.json` and `wails.json` for what scripts are run and what packages are installed.
:::
## build
`wails build` is used for compiling your project to a production-ready binary.
| Flag | Description | Default |
|:---------------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:----------------------------------------------------------------------------------------------------------------------------------------------|
| -platform | Build for the given (comma delimited) [platforms](../reference/cli.mdx#platforms) eg. `windows/arm64`. Note, if you do not give the architecture, `runtime.GOARCH` is used. | platform = `GOOS` environment variable if given else `runtime.GOOS`.<br/>arch = `GOARCH` envrionment variable if given else `runtime.GOARCH`. |
| -clean | Cleans the `build/bin` directory | |
| -compiler "compiler" | Use a different go compiler to build, eg go1.15beta1 | go |
| -ldflags "flags" | Additional ldflags to pass to the compiler | |
| -nopackage | Do not package application | |
| -o filename | Output filename | |
| -s | Skip building the frontend | false |
| -f | Force build application | false |
| -tags "extra tags" | Build tags to pass to Go compiler. Must be quoted. Space or comma (but not both) separated | |
| -upx | Compress final binary using "upx" | |
| -upxflags | Flags to pass to upx | |
| -v int | Verbosity level (0 - silent, 1 - default, 2 - verbose) | 1 |
| -webview2 | WebView2 installer strategy: download,embed,browser,error | download |
| -u | Updates your project's `go.mod` to use the same version of Wails as the CLI | |
| -debug | Retains debug information in the application. Allows the use of the devtools in the application window | false |
| -trimpath | Remove all file system paths from the resulting executable. | false |
| -race | Build with Go's race detector | false |
| -windowsconsole | Keep the console window for Windows builds | |
| -obfuscate | Obfuscate the application using [garble](https://github.com/burrowers/garble) | false |
| -garbleargs | Arguments to pass to garble | `-literals -tiny -seed=random` |
For a detailed description of the `webview2` flag, please refer to the [Windows](../guides/windows.mdx) Guide.
If you prefer to build using standard Go tooling, please consult the [Manual Builds](../guides/manual-builds.mdx)
guide.
Example:
`wails build -clean -o myproject.exe`
:::Info
On Mac, the application will be bundled with `Info.plist`, not `Info.dev.plist`.
:::
:::info UPX on Apple Silicon
There are [issues](https://github.com/upx/upx/issues/446) with using UPX with Apple Silicon.
:::
:::info UPX on Windows
Some Antivirus vendors false positively mark `upx` compressed binaries as virus, see [issue](https://github.com/upx/upx/issues/437).
:::
### Platforms
Supported platforms are:
| Platform | Description |
| :--------------- | :-------------------------------------------- |
| darwin | MacOS + architecture of build machine |
| darwin/amd64 | MacOS 10.13+ AMD64 |
| darwin/arm64 | MacOS 11.0+ ARM64 |
| darwin/universal | MacOS AMD64+ARM64 universal application |
| windows | Windows 10/11 + architecture of build machine |
| windows/amd64 | Windows 10/11 AMD64 |
| windows/arm64 | Windows 10/11 ARM64 |
| linux | Linux + architecture of build machine |
| linux/amd64 | Linux AMD64 |
| linux/arm64 | Linux ARM64 |
## doctor
`wails doctor` will run diagnostics to ensure that your system is ready for development.
Example:
```
Wails CLI v2.0.0-beta
Scanning system - Please wait (this may take a long time)...Done.
System
------
OS: Windows 10 Pro
Version: 2009 (Build: 19043)
ID: 21H1
Go Version: go1.18
Platform: windows
Architecture: amd64
Dependency Package Name Status Version
---------- ------------ ------ -------
WebView2 N/A Installed 93.0.961.52
npm N/A Installed 6.14.15
*upx N/A Installed upx 3.96
* - Optional Dependency
Diagnosis
---------
Your system is ready for Wails development!
```
## dev
`wails dev` is used to run your application in a "live development" mode. This means:
- The application's `go.mod` will be updated to use the same version of Wails as the CLI
- The application is compiled and run automatically
- A watcher is started and will trigger a rebuild of your dev app if it detects changes to your go files
- A webserver is started on `http://localhost:34115` which serves your application (not just frontend) over http. This allows you to use your favourite browser development extensions
- All application assets are loaded from disk. If they are changed, the application will automatically reload (not rebuild). All connected browsers will also reload
- A JS module is generated that provides the following:
- Javascript wrappers of your Go methods with autogenerated JSDoc, providing code hinting
- TypeScript versions of your Go structs, that can be constructed and passed to your go methods
- A second JS module is generated that provides a wrapper + TS declaration for the runtime
- On macOS, it will bundle the application into a `.app` file and run it. It will use a `build/darwin/Info.dev.plist` for development.
| Flag | Description | Default |
| :--------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :-------------------- |
| -assetdir "./path/to/assets" | Serve assets from the given directory instead of using the provided asset FS | Value in `wails.json` |
| -browser | Opens a browser to `http://localhost:34115` on startup | |
| -compiler "compiler" | Use a different go compiler to build, eg go1.15beta1 | go |
| -e | Extensions to trigger rebuilds (comma separated) | go |
| -reloaddirs | Additional directories to trigger reloads (comma separated) | Value in `wails.json` |
| -ldflags "flags" | Additional ldflags to pass to the compiler | |
| -tags "extra tags" | Build tags to pass to compiler (quoted and space separated) | |
| -loglevel "loglevel" | Loglevel to use - Trace, Debug, Info, Warning, Error | Debug |
| -noreload | Disable automatic reload when assets change | |
| -nogen | Disable generate module | |
| -v | Verbosity level (0 - silent, 1 - standard, 2 - verbose) | 1 |
| -wailsjsdir | The directory to generate the generated Wails JS modules | Value in `wails.json` |
| -debounce | The time to wait for reload after an asset change is detected | 100 (milliseconds) |
| -devserver "host:port" | The address to bind the wails dev server to | "localhost:34115" |
| -frontenddevserverurl "url" | Use 3rd party dev server url to serve assets, EG Vite | "" |
| -appargs "args" | Arguments passed to the application in shell style | |
| -save | Saves the given `assetdir`, `reloaddirs`, `wailsjsdir`, `debounce`, `devserver` and `frontenddevserverurl` flags in `wails.json` to become the defaults for subsequent invocations. | |
| -race | Build with Go's race detector | false |
| -s | Skip building the frontend | false |
Example:
`wails dev -assetdir ./frontend/dist -wailsjsdir ./frontend/src -browser`
This command will do the following:
- Build the application and run it (more details [here](../guides/manual-builds.mdx)
- Generate the Wails JS modules in `./frontend/src`
- Watch for updates to files in `./frontend/dist` and reload on any change
- Open a browser and connect to the application
There is more information on using this feature with existing framework scripts [here](../guides/application-development.mdx#live-reloading).
## generate
### template
Wails uses templates for project generation. The `wails generate template` command helps scaffold a template so that
it may be used for generating projects.
| Flag | Description |
| :--------------- | :------------------------------------------ |
| -name | The template name (Mandatory) |
| -frontend "path" | Path to frontend project to use in template |
For more details on creating templates, consult the [Templates guide](../guides/templates.mdx).
### module
The `wails generate module` command allows you to manually generate the `wailsjs` directory for your application.
## update
`wails update` will update the version of the Wails CLI.
| Flag | Description |
| :----------------- | :------------------------------------ |
| -pre | Update to latest pre-release version |
| -version "version" | Install a specific version of the CLI |
## version
`wails version` will simply output the current CLI version.

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# Menus
It is possible to add an application menu to Wails projects. This is achieved by defining a [Menu](#menu) struct and
setting it in the [`Menu`](../reference/options.mdx#menu) application config, or by calling the runtime method
[MenuSetApplicationMenu](../reference/runtime/menu.mdx#menusetapplicationmenu).
An example of how to create a menu:
```go
AppMenu := menu.NewMenu()
FileMenu := AppMenu.AddSubmenu("File")
FileMenu.AddText("&Open", keys.CmdOrCtrl("o"), openFile)
FileMenu.AddSeparator()
FileMenu.AddText("Quit", keys.CmdOrCtrl("q"), func(_ *menu.CallbackData) {
runtime.Quit()
})
if runtime.GOOS == "darwin" {
AppMenu.Append(menu.EditMenu()) // on macos platform, we should append EditMenu to enable Cmd+C,Cmd+V,Cmd+Z... shortcut
}
err := wails.Run(&options.App{
Title: "Menus Demo",
Width: 800,
Height: 600,
Menu: AppMenu,
Bind: []interface{}{
app,
},
)
// ...
```
It is also possible to dynamically update the menu, by updating the menu struct and calling
[MenuUpdateApplicationMenu](../reference/runtime/menu.mdx#menuupdateapplicationmenu).
The example above uses helper methods, however it's possible to build the menu structs manually.
## Menu
A Menu is a collection of MenuItems:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
type Menu struct {
Items []*MenuItem
}
```
For the Application menu, each MenuItem represents a single menu such as "Edit".
A simple helper method is provided for building menus:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
func NewMenuFromItems(first *MenuItem, rest ...*MenuItem) *Menu
```
This makes the layout of the code more like that of a menu without the need to add the menu items manually after creating them.
Alternatively, you can just create the menu items and add them to the menu manually.
## MenuItem
A MenuItem represents an item within a Menu.
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
// MenuItem represents a menu item contained in a menu
type MenuItem struct {
Label string
Role Role
Accelerator *keys.Accelerator
Type Type
Disabled bool
Hidden bool
Checked bool
SubMenu *Menu
Click Callback
}
```
| Field | Type | Notes |
| ----------- | ---------------------------------- | ------------------------------------------------------------- |
| Label | string | The menu text |
| Accelerator | [\*keys.Accelerator](#accelerator) | Key binding for this menu item |
| Type | [Type](#type) | Type of MenuItem |
| Disabled | bool | Disables the menu item |
| Hidden | bool | Hides this menu item |
| Checked | bool | Adds check to item (Checkbox & Radio types) |
| SubMenu | [\*Menu](#menu) | Sets the submenu |
| Click | [Callback](#callback) | Callback function when menu clicked |
| Role | string | Defines a [role](#role) for this menu item. Mac only for now. |
### Accelerator
Accelerators (sometimes called keyboard shortcuts) define a binding between a keystroke and a menu item. Wails defines
an Accelerator as a combination or key + [Modifier](#modifier). They are available in the `"github.com/wailsapp/wails/v2/pkg/menu/keys"` package.
Example:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu/keys"
// Defines cmd+o on Mac and ctrl-o on Window/Linux
myShortcut := keys.CmdOrCtrl("o")
```
Keys are any single character on a keyboard with the exception of `+`, which is defined as `plus`.
Some keys cannot be represented as characters so there are a set of named characters that may be used:
| | | | |
| :---------: | :---: | :---: | :-------: |
| `backspace` | `f1` | `f16` | `f31` |
| `tab` | `f2` | `f17` | `f32` |
| `return` | `f3` | `f18` | `f33` |
| `enter` | `f4` | `f19` | `f34` |
| `escape` | `f5` | `f20` | `f35` |
| `left` | `f6` | `f21` | `numlock` |
| `right` | `f7` | `f22` | |
| `up` | `f8` | `f23` | |
| `down` | `f9` | `f24` | |
| `space` | `f10` | `f25` | |
| `delete` | `f11` | `f36` | |
| `home` | `f12` | `f37` | |
| `end` | `f13` | `f38` | |
| `page up` | `f14` | `f39` | |
| `page down` | `f15` | `f30` | |
Wails also supports parsing accelerators using the same syntax as Electron. This is useful for storing accelerators in
config files.
Example:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu/keys"
// Defines cmd+o on Mac and ctrl-o on Window/Linux
myShortcut, err := keys.Parse("Ctrl+Option+A")
```
#### Modifier
The following modifiers are keys that may be used in combination with the accelerator key:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu/keys"
const (
// CmdOrCtrlKey represents Command on Mac and Control on other platforms
CmdOrCtrlKey Modifier = "cmdorctrl"
// OptionOrAltKey represents Option on Mac and Alt on other platforms
OptionOrAltKey Modifier = "optionoralt"
// ShiftKey represents the shift key on all systems
ShiftKey Modifier = "shift"
// ControlKey represents the control key on all systems
ControlKey Modifier = "ctrl"
)
```
A number of helper methods are available to create Accelerators using modifiers:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu/keys"
func CmdOrCtrl(key string) *Accelerator
func OptionOrAlt(key string) *Accelerator
func Shift(key string) *Accelerator
func Control(key string) *Accelerator
```
Modifiers can be combined using `keys.Combo(key string, modifier1 Modifier, modifier2 Modifier, rest ...Modifier)`:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu/keys"
// Defines "Ctrl+Option+A" on Mac and "Ctrl+Alt+A" on Window/Linux
myShortcut := keys.Combo("a", ControlKey, OptionOrAltKey)
```
### Type
Each menu item must have a type and there are 5 types available:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
const (
TextType Type = "Text"
SeparatorType Type = "Separator"
SubmenuType Type = "Submenu"
CheckboxType Type = "Checkbox"
RadioType Type = "Radio"
)
```
For convenience, helper methods are provided to quickly create a menu item:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
func Text(label string, accelerator *keys.Accelerator, click Callback) *MenuItem
func Separator() *MenuItem
func Radio(label string, selected bool, accelerator *keys.Accelerator, click Callback) *MenuItem
func Checkbox(label string, checked bool, accelerator *keys.Accelerator, click Callback) *MenuItem
func SubMenu(label string, menu *Menu) *Menu
```
You can also create menu items directly on a menu by using the "Add" helpers:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
func (m *Menu) AddText(label string, accelerator *keys.Accelerator, click Callback) *MenuItem
func (m *Menu) AddSeparator() *MenuItem
func (m *Menu) AddRadio(label string, selected bool, accelerator *keys.Accelerator, click Callback) *MenuItem
func (m *Menu) AddCheckbox(label string, checked bool, accelerator *keys.Accelerator, click Callback) *MenuItem
func (m *Menu) AddSubMenu(label string, menu *Menu) *MenuI
```
A note on radio groups: A radio group is defined as a number of radio menu items that are next to each other in the menu.
This means that you do not need to group items together as it is automatic. However, that also means you cannot have 2
radio groups next to each other - there must be a non-radio item between them.
### Callback
Each menu item may have a callback that is executed when the item is clicked:
```go title="Package: github.com/wailsapp/wails/v2/pkg/menu"
type Callback func(*CallbackData)
type CallbackData struct {
MenuItem *MenuItem
}
```
The function is given a `CallbackData` struct which indicates which menu item triggered the callback. This is useful when
using radio groups that may share a callback.
### Role
:::info Roles
Roles are currently supported on Mac only.
:::
A menu item may have a role, which is essentially a pre-defined menu item. We currently support the following roles:
| Role | Description |
| ------------ | ------------------------------------------------------------------------ |
| AppMenuRole | The standard Mac application menu. Can be created using `menu.AppMenu()` |
| EditMenuRole | The standard Mac edit menu. Can be created using `menu.EditMenu()` |

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# Options
## Application Options
The `Options.App` struct contains the application configuration.
It is passed to the `wails.Run()` method:
```go title="Example"
import "github.com/wailsapp/wails/v2/pkg/options"
func main() {
err := wails.Run(&options.App{
Title: "Menus Demo",
Width: 800,
Height: 600,
DisableResize: false,
Fullscreen: false,
Frameless: true,
MinWidth: 400,
MinHeight: 400,
MaxWidth: 1280,
MaxHeight: 1024,
StartHidden: false,
HideWindowOnClose: false,
BackgroundColour: &options.RGBA{R: 0, G: 0, B: 0, A: 255},
AlwaysOnTop: false,
Assets: assets,
AssetsHandler: assetsHandler,
Menu: app.applicationMenu(),
Logger: nil,
LogLevel: logger.DEBUG,
LogLevelProduction: logger.ERROR,
OnStartup: app.startup,
OnDomReady: app.domready,
OnShutdown: app.shutdown,
OnBeforeClose: app.beforeClose,
WindowStartState: options.Maximised,
CSSDragProperty: "--wails-draggable",
CSSDragValue: "drag",
ZoomFactor: 1.0,
IsZoomControlEnabled: false,
Bind: []interface{}{
app,
},
Windows: &windows.Options{
WebviewIsTransparent: false,
WindowIsTranslucent: false,
BackdropType: windows.Mica,
DisableWindowIcon: false,
DisableFramelessWindowDecorations: false,
WebviewUserDataPath: "",
WebviewBrowserPath: "",
Theme: windows.SystemDefault,
CustomTheme: &windows.ThemeSettings{
DarkModeTitleBar: windows.RGB(20, 20, 20),
DarkModeTitleText: windows.RGB(200, 200, 200),
DarkModeBorder: windows.RGB(20, 0, 20),
LightModeTitleBar: windows.RGB(200, 200, 200),
LightModeTitleText: windows.RGB(20, 20, 20),
LightModeBorder: windows.RGB(200, 200, 200),
},
// User messages that can be customised
Messages *windows.Messages
// OnSuspend is called when Windows enters low power mode
OnSuspend func()
// OnResume is called when Windows resumes from low power mode
OnResume func()
},
Mac: &mac.Options{
TitleBar: &mac.TitleBar{
TitlebarAppearsTransparent: true,
HideTitle: false,
HideTitleBar: false,
FullSizeContent: false,
UseToolbar: false,
HideToolbarSeparator: true,
},
Appearance: mac.NSAppearanceNameDarkAqua,
WebviewIsTransparent: true,
WindowIsTranslucent: false,
About: &mac.AboutInfo{
Title: "My Application",
Message: "© 2021 Me",
Icon: icon,
},
},
Linux: &linux.Options{
Icon: icon,
WindowIsTranslucent: false,
},
})
if err != nil {
log.Fatal(err)
}
}
```
### Title
The text shown in the window's title bar.
Name: Title<br/>
Type: `string`
### Width
The initial width of the window.
Name: Width<br/>
Type: `int`<br/>
Default: 1024.
### Height
The initial height of the window.
Name: Height<br/>
Type: `int`<br/>
Default: 768
### DisableResize
By default, the main window is resizable. Setting this to `true` will keep it a fixed size.
Name: DisableResize<br/>
Type: `bool`
### Fullscreen
Setting this to `true` will make the window fullscreen at startup.
Name: Fullscreen<br/>
Type: `bool`
### Frameless
When set to `true`, the window will have no borders or title bar.
Also see [Frameless Windows](../guides/frameless.mdx).
Name: Frameless<br/>
Type: `bool`
### MinWidth
This sets the minimum width for the window. If the value given in `Width` is less than this value,
the window will be set to `MinWidth` by default.
Name: MinWidth<br/>
Type: `int`
### MinHeight
This sets the minimum height for the window. If the value given in `Height` is less than this value,
the window will be set to `MinHeight` by default.
Name: MinHeight<br/>
Type: `int`
### MaxWidth
This sets the maximum width for the window. If the value given in `Width` is more than this value,
the window will be set to `MaxWidth` by default.
Name: MaxWidth<br/>
Type: `int`
### MaxHeight
This sets the maximum height for the window. If the value given in `Height` is more than this value,
the window will be set to `MaxHeight` by default.
Name: MaxHeight<br/>
Type: `int`
### StartHidden
When set to `true`, the application will be hidden until [WindowShow](../reference/runtime/window.mdx#windowshow)
is called.
Name: StartHidden<br/>
Type: `bool`
### HideWindowOnClose
By default, closing the window will close the application. Setting this to `true` means closing the window will
hide the window instead.
Name: HideWindowOnClose<br/>
Type: `bool`
### BackgroundColour
This value is the default background colour of the window.
Example: options.NewRGBA(255,0,0,128) - Red at 50% transparency
Name: BackgroundColour<br/>
Type: `*options.RGBA`<br/>
Default: white
### AlwaysOnTop
Indicates that the window should stay above other windows when losing focus.
Name: AlwaysOnTop<br/>
Type: `bool`
### Assets
The frontend assets to be used by the application. Requires an `index.html` file.
Name: Assets<br/>
Type: `embed.FS`
### AssetsHandler
<img src="http://badges.github.io/stability-badges/dist/experimental.svg" />
The assets handler is a generic `http.Handler` which will be called for any non GET request on the assets server
and for GET requests which can not be served from the `assets` because the file is not found.
| Value | Win | Mac | Lin |
| ----------------------- | --- | --- | --- |
| GET | ✅ | ✅ | ✅ |
| POST | ✅ | ✅ | ❌ |
| PUT | ✅ | ✅ | ❌ |
| PATCH | ✅ | ✅ | ❌ |
| DELETE | ✅ | ✅ | ❌ |
| Request Headers | ✅ | ✅ | ❌ |
| Request Body | ✅ | ✅ | ❌ |
| Request Body Streaming | ❌ | ❌ | ❌ |
| Response StatusCodes | ✅ | ✅ | ❌ |
| Response Headers | ✅ | ✅ | ❌ |
| Response Body | ✅ | ✅ | ✅ |
| Response Body Streaming | ❌ | ❌ | ✅ |
NOTE: Linux is currently very limited due to targeting a WebKit2GTK Version < 2.36.0. In the future some features will be
supported by the introduction of WebKit2GTK 2.36.0+ support.
NOTE: When used in combination with a Frontend DevServer there might be limitations, eg. Vite serves the index.html
on every path, that does not contain a file extension.
Name: AssetsHandler<br/>
Type: `http.Handler`
### Menu
The menu to be used by the application. More details about Menus in the [Menu Reference](../reference/runtime/menu.mdx).
:::note
On Mac, if no menu is specified, a default menu will be created.
:::
Name: Menu<br/>
Type: `*menu.Menu`
### Logger
The logger to be used by the application. More details about logging in the [Log Reference](../reference/runtime/log.mdx).
Name: Logger<br/>
Type: `logger.Logger`<br/>
Default: Logs to Stdout
### LogLevel
The default log level. More details about logging in the [Log Reference](../reference/runtime/log.mdx).
Name: LogLevel<br/>
Type: `logger.LogLevel`<br/>
Default: `Info` in dev mode, `Error` in production mode
### LogLevelProduction
The default log level for production builds. More details about logging in the [Log Reference](../reference/runtime/log.mdx).
Name: LogLevelProduction<br/>
Type: `logger.LogLevel`<br/>
Default: `Error`
### OnStartup
This callback is called after the frontend has been created, but before `index.html` has been loaded. It is given
the application context.
Name: OnStartup<br/>
Type: `func(ctx context.Context)`
### OnDomReady
This callback is called after the frontend has loaded `index.html` and its resources. It is given
the application context.
Name: OnDomReady<br/>
Type: `func(ctx context.Context)`
### OnShutdown
This callback is called after the frontend has been destroyed, just before the application terminates. It is given
the application context.
Name: OnShutdown<br/>
Type: `func(ctx context.Context)`
### OnBeforeClose
If this callback is set, it will be called when the application is about to quit, either by clicking the window close
button or calling `runtime.Quit`. Returning true will cause the application to continue, false will continue shutdown
as normal. This is good for confirming with the user that they wish to exit the program.
Example:
```go title=windowsapp.go
func (b *App) beforeClose(ctx context.Context) (prevent bool) {
dialog, err := runtime.MessageDialog(ctx, runtime.MessageDialogOptions{
Type: runtime.QuestionDialog,
Title: "Quit?",
Message: "Are you sure you want to quit?",
})
if err != nil {
return false
}
return dialog != "Yes"
}
```
Name: OnBeforeClose<br/>
Type: `func(ctx context.Context) bool`
### WindowStartState
Defines how the window should present itself at startup.
| Value | Win | Mac | Lin |
| ---------- | --- | --- | --- |
| Fullscreen | ✅ | ✅ | ✅ |
| Maximised | ✅ | ✅ | ✅ |
| Minimised | ✅ | ❌ | ✅ |
Name: WindowStartState<br/>
Type: `options.WindowStartState`
### CSSDragProperty
Indicates the CSS property to use to identify which elements can be used to drag the window. Default: `--wails-draggable`.
Name: CSSDragProperty<br/>
Type: `string`
### CSSDragValue
Indicates what value the `CSSDragProperty` style should have to drag the window. Default: `drag`.
Name: CSSDragValue<br/>
Type: `string`
### Bind
A slice of struct instances defining methods that need to be bound to the frontend.
Name: Bind<br/>
Type: `[]interface{}`
### Windows
This defines [Windows specific options](#windows).
Name: Windows<br/>
Type: `*windows.Options`
#### WebviewIsTransparent
Setting this to `true` will make the webview background transparent when an alpha value of `0` is used.
This means that if you use `rgba(0,0,0,0)` for `background-color` in your CSS, the host window will show through.
Often combined with [WindowIsTranslucent](#WindowIsTranslucent) to make frosty-looking applications.
Name: WebviewIsTransparent<br/>
Type: `bool`
#### WindowIsTranslucent
Setting this to `true` will make the window background translucent. Often combined
with [WebviewIsTransparent](#WebviewIsTransparent).
For Windows 11 versions before build 22621, this will use the [BlurBehind](https://learn.microsoft.com/en-us/windows/win32/dwm/blur-ovw)
method for translucency, which can be slow. For Windows 11 versions after build 22621, this will enable the
newer translucency types that are much faster. By default, the type of translucency used will be determined
by Windows. To configure this, use the [BackdropType](#BackdropType) option.
Name: WindowIsTranslucent<br/>
Type: `bool`
#### BackdropType
:::note
Requires Windows 11 build 22621 or later.
:::
Sets the translucency type of the window. This is only applicable if [WindowIsTranslucent](#WindowIsTranslucent) is set to `true`.
Name: BackdropType<br/>
Type `windows.BackdropType`
The value can be one of the following:
| Value | Description |
|---------|-------------------------------------------------------------------------------------------|
| Auto | Let Windows decide which backdrop to use |
| None | Do not use translucency |
| Acrylic | Use [Acrylic](https://learn.microsoft.com/en-us/windows/apps/design/style/acrylic) effect |
| Mica | Use [Mica](https://learn.microsoft.com/en-us/windows/apps/design/style/mica) effect |
| Tabbed | Use Tabbed. This is a backdrop that is similar to Mica. |
#### DisableWindowIcon
Setting this to `true` will remove the icon in the top left corner of the title bar.
Name: DisableWindowIcon<br/>
Type: `bool`
#### DisableFramelessWindowDecorations
Setting this to `true` will remove the window decorations in [Frameless](#Frameless) mode. This means there will be no
'Aero Shadow' and no 'Rounded Corners' shown for the window. Please note that 'Rounded Corners' are only supported on
Windows 11.
Name: DisableFramelessWindowDecorations<br/>
Type: `bool`
#### WebviewUserDataPath
This defines the path where the WebView2 stores the user data. If empty `%APPDATA%\[BinaryName.exe]` will be used.
Name: WebviewUserDataPath<br/>
Type: `string`
#### WebviewBrowserPath
This defines the path to a directory with WebView2 executable files and libraries. If empty, webview2 installed in the system will be used.
Important information about distribution of fixed version runtime:
- [How to get and extract runtime](https://docs.microsoft.com/en-us/microsoft-edge/webview2/concepts/distribution#details-about-the-fixed-version-runtime-distribution-mode)
- [Known issues for fixed version](https://docs.microsoft.com/en-us/microsoft-edge/webview2/concepts/distribution#known-issues-for-fixed-version)
- [The path of fixed version of the WebView2 Runtime should not contain \Edge\Application\.](https://docs.microsoft.com/en-us/microsoft-edge/webview2/reference/win32/webview2-idl?view=webview2-1.0.1245.22#createcorewebview2environmentwithoptions)
Name: WebviewBrowserPath<br/>
Type: `string`
### ZoomFactor
Name: ZoomFactor<br/>
Type: `float64`
This defines the zoom factor for the WebView2. This is the option matching the Edge user activated zoom in or out.
### IsZoomControlEnabled
Name: IsZoomControlEnabled<br/>
Type: `bool`
This enables the zoom factor to be changed by the user. Please note that the zoom factor can be set in the options while
disallowing the user to change it at runtime (f.e. for a kiosk application or similar).
#### Theme
Minimum Windows Version: Windows 10 2004/20H1
This defines the theme that the application should use:
| Value | Description |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
| SystemDefault | _Default_. The theme will be based on the system default. If the user changes their theme, the application will update to use the new setting |
| Dark | The application will use a dark theme exclusively |
| Light | The application will use a light theme exclusively |
Name: Theme<br/>
Type: `windows.Theme`
#### CustomTheme
:::note
Minimum Windows Version: Windows 10/11 2009/21H2 Build 22000
:::
Allows you to specify custom colours for TitleBar, TitleText and Border for both light and dark mode, as well as
when the window is active or inactive.
Name: CustomTheme<br/>
Type: `windows.CustomTheme`
##### CustomTheme type
The CustomTheme struct uses `int32` to specify the colour values. These are in the standard(!) Windows format of:
`0x00BBGGAA`. A helper function is provided to do RGB conversions into this format: `windows.RGB(r,g,b uint8)`.
NOTE: Any value not provided will default to black.
```go
type ThemeSettings struct {
DarkModeTitleBar int32
DarkModeTitleBarInactive int32
DarkModeTitleText int32
DarkModeTitleTextInactive int32
DarkModeBorder int32
DarkModeBorderInactive int32
LightModeTitleBar int32
LightModeTitleBarInactive int32
LightModeTitleText int32
LightModeTitleTextInactive int32
LightModeBorder int32
LightModeBorderInactive int32
}
```
Example:
```go
CustomTheme: &windows.ThemeSettings{
// Theme to use when window is active
DarkModeTitleBar: windows.RGB(255, 0, 0), // Red
DarkModeTitleText: windows.RGB(0, 255, 0), // Green
DarkModeBorder: windows.RGB(0, 0, 255), // Blue
LightModeTitleBar: windows.RGB(200, 200, 200),
LightModeTitleText: windows.RGB(20, 20, 20),
LightModeBorder: windows.RGB(200, 200, 200),
// Theme to use when window is inactive
DarkModeTitleBarInactive: windows.RGB(128, 0, 0),
DarkModeTitleTextInactive: windows.RGB(0, 128, 0),
DarkModeBorderInactive: windows.RGB(0, 0, 128),
LightModeTitleBarInactive: windows.RGB(100, 100, 100),
LightModeTitleTextInactive: windows.RGB(10, 10, 10),
LightModeBorderInactive: windows.RGB(100, 100, 100),
},
```
#### Messages
A struct of strings used by the webview2 installer if a valid webview2 runtime is not found.
Name: Messages<br/>
Type: `*windows.Messages`
Customise this for any language you choose to support.
#### ResizeDebounceMS
ResizeDebounceMS is the amount of time to debounce redraws of webview2 when resizing the window.
The default value (0) will perform redraws as fast as it can.
Name: ResizeDebounceMS<br/>
Type: `uint16`
#### OnSuspend
If set, this function will be called when Windows initiates a switch to low power mode (suspend/hibernate)
Name: OnSuspend<br/>
Type: `func()`
#### OnResume
If set, this function will be called when Windows resumes from low power mode (suspend/hibernate)
Name: OnResume<br/>
Type: `func()`
### Mac
This defines [Mac specific options](#mac).
Name: Mac<br/>
Type: `*mac.Options`
#### TitleBar
The TitleBar struct provides the ability to configure the look and feel of the title bar.
Name: TitleBar<br/>
Type: [`*mac.TitleBar`](#titlebar-struct)
##### Titlebar struct
The titlebar of the application can be customised by using the TitleBar options:
```go
type TitleBar struct {
TitlebarAppearsTransparent bool
HideTitle bool
HideTitleBar bool
FullSizeContent bool
UseToolbar bool
HideToolbarSeparator bool
}
```
| Name | Description |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| TitlebarAppearsTransparent | Makes the titlebar transparent. This has the effect of hiding the titlebar and the content fill the window. [Apple Docs](https://developer.apple.com/documentation/appkit/nswindow/1419167-titlebarappearstransparent?language=objc) |
| HideTitle | Hides the title of the window. [Apple Docs](https://developer.apple.com/documentation/appkit/nswindowtitlevisibility?language=objc) |
| HideTitleBar | Removes [NSWindowStyleMaskTitled](https://developer.apple.com/documentation/appkit/nswindowstylemask/nswindowstylemasktitled/) from the style mask |
| FullSizeContent | Makes the webview fill the entire window. [Apple Docs](https://developer.apple.com/documentation/appkit/nswindowstylemask/nswindowstylemaskfullsizecontentview) |
| UseToolbar | Adds a default toolbar to the window. [Apple Docs](https://developer.apple.com/documentation/appkit/nstoolbar?language=objc) |
| HideToolbarSeparator | Removes the line beneath the toolbar. [Apple Docs](https://developer.apple.com/documentation/appkit/nstoolbar/1516954-showsbaselineseparator?language=objc) |
Preconfigured titlebar settings are available:
| Setting | Example |
| --------------------------- | ---------------------------------------------- |
| `mac.TitleBarDefault()` | ![](/img/reference/titlebar-default.webp) |
| `mac.TitleBarHidden()` | ![](/img/reference/titlebar-hidden.webp) |
| `mac.TitleBarHiddenInset()` | ![](/img/reference/titlebar-hidden-inset.webp) |
Example:
```go
Mac: &mac.Options{
TitleBar: mac.TitleBarHiddenInset(),
}
```
Click [here](https://github.com/lukakerr/NSWindowStyles) for some inspiration on customising the titlebar.
#### Appearance
Appearance is used to set the style of your app in accordance with Apple's [NSAppearance](https://developer.apple.com/documentation/appkit/nsappearancename?language=objc) names.
Name: Appearance<br/>
Type: [`mac.AppearanceType`](#appearance-type)
##### Appearance type
You can specify the application's [appearance](https://developer.apple.com/documentation/appkit/nsappearance?language=objc).
| Value | Description |
| ----------------------------------------------------- | --------------------------------------------------------------- |
| DefaultAppearance | DefaultAppearance uses the default system value |
| NSAppearanceNameAqua | The standard light system appearance |
| NSAppearanceNameDarkAqua | The standard dark system appearance |
| NSAppearanceNameVibrantLight | The light vibrant appearance |
| NSAppearanceNameAccessibilityHighContrastAqua | A high-contrast version of the standard light system appearance |
| NSAppearanceNameAccessibilityHighContrastDarkAqua | A high-contrast version of the standard dark system appearance |
| NSAppearanceNameAccessibilityHighContrastVibrantLight | A high-contrast version of the light vibrant appearance |
| NSAppearanceNameAccessibilityHighContrastVibrantDark | A high-contrast version of the dark vibrant appearance |
Example:
```go
Mac: &mac.Options{
Appearance: mac.NSAppearanceNameDarkAqua,
}
```
#### WebviewIsTransparent
Setting this to `true` will make the webview background transparent when an alpha value of `0` is used.
This means that if you use `rgba(0,0,0,0)` for `background-color` in your CSS, the host window will show through.
Often combined with [WindowIsTranslucent](#WindowIsTranslucent) to make frosty-looking applications.
Name: WebviewIsTransparent<br/>
Type: `bool`
#### WindowIsTranslucent
Setting this to `true` will make the window background translucent. Often combined
with [WebviewIsTransparent](#WebviewIsTransparent) to make frosty-looking applications.
Name: WindowIsTranslucent<br/>
Type: `bool`
#### About
This configuration lets you set the title, message and icon for the "About" menu item in the app menu created by the "AppMenu" role.
Name: About<br/>
Type: [`*mac.AboutInfo`](#about-struct)
##### About struct
```go
type AboutInfo struct {
Title string
Message string
Icon []byte
}
```
If these settings are provided, an "About" menu item will appear in the app menu (when using the `AppMenu` role).
Given this configuration:
```go
//go:embed build/appicon.png
var icon []byte
func main() {
err := wails.Run(&options.App{
...
Mac: &mac.Options{
About: &mac.AboutInfo{
Title: "My Application",
Message: "© 2021 Me",
Icon: icon,
},
},
})
```
The "About" menu item will appear in the app menu:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/reference/about-menu.webp").default}
class="screenshot"
/>
</div>
<br />
```
When clicked, that will open an about message box:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/reference/about-dialog.webp").default}
width="40%"
class="screenshot"
/>
</div>
<br />
```
### Linux
This defines [Linux specific options](#linux).
Name: Linux<br/>
Type: `*linux.Options`
#### Icon
Sets up the icon representing the window. This icon is used when the window is minimized (also known as iconified).
Name: Icon<br/>
Type: `[]byte`
Some window managers or desktop environments may also place it in the window frame, or display it in other contexts.
On others, the icon is not used at all, so your mileage may vary.
NOTE: Gnome on Wayland at least does not display this icon. To have a application icon there, a `.desktop` file has to be used.
On KDE it should work.
The icon should be provided in whatever size it was naturally drawn; that is, dont scale the image before passing it.
Scaling is postponed until the last minute, when the desired final size is known, to allow best quality.
#### WindowIsTranslucent
Setting this to `true` will make the window background translucent. Some window managers may ignore it, or result in a black window.
Name: WindowIsTranslucent<br/>
Type: `bool`

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# Project Config
The project config resides in the `wails.json` file in the project directory. The structure of the config is:
```json
{
"name": "[The project name]",
"assetdir": "[Relative path to the directory containing the compiled assets, this is normally inferred and could be left empty]",
"reloaddirs": "[Additional directories to trigger reloads (comma separated), this is only used for some advanced asset configurations]",
"frontend:install": "[The command to install node dependencies, run in the frontend directory - often `npm install`]",
"frontend:build": "[The command to build the assets, run in the frontend directory - often `npm run build`]",
"frontend:dev": "[This command has been replaced by frontend:dev:build. If frontend:dev:build is not specified will falls back to this command. \nIf this command is also not specified will falls back to frontend:build]",
"frontend:dev:build": "[This command is the dev equivalent of frontend:build. If not specified falls back to frontend:dev]",
"frontend:dev:install": "[This command is the dev equivalent of frontend:install. If not specified falls back to frontend:install]",
"frontend:dev:watcher": "[This command is run in a separate process on `wails dev`. Useful for 3rd party watchers or starting 3d party dev servers]",
"frontend:dev:serverUrl": "[URL to a 3rd party dev server to be used to serve assets, EG Vite. \nIf this is set to 'auto' then the devServerUrl will be inferred from the Vite output]",
"wailsjsdir": "[Relative path to the directory that the auto-generated JS modules will be created]",
"version": "[Project config version]",
"outputfilename": "[The name of the binary]",
"debounceMS": 100, // The default time the dev server waits to reload when it detects a change in assets
"devServer": "[Address to bind the wails dev sever to. Default: localhost:34115]",
"appargs": "[Arguments passed to the application in shell style when in dev mode]",
"runNonNativeBuildHooks": false, // Defines if build hooks should be run though they are defined for an OS other than the host OS.
"preBuildHooks": {
"GOOS/GOARCH": "[The command that will be executed before a build of the specified GOOS/GOARCH: ${platform} is replaced with the "GOOS/GOARCH". The "GOOS/GOARCH" hook is executed before the "GOOS/*" and "*/*" hook.]",
"GOOS/*": "[The command that will be executed before a build of the specified GOOS: ${platform} is replaced with the "GOOS/GOARCH". The "GOOS/*" hook is executed before the "*/*" hook.]",
"*/*": "[The command that will be executed before every build: ${platform} is replaced with the "GOOS/GOARCH".]"
},
"postBuildHooks": {
"GOOS/GOARCH": "[The command that will be executed after a build of the specified GOOS/GOARCH: ${platform} is replaced with the "GOOS/GOARCH" and ${bin} with the path to the compiled binary. The "GOOS/GOARCH" hook is executed before the "GOOS/*" and "*/*" hook.]",
"GOOS/*": "[The command that will be executed after a build of the specified GOOS: ${platform} is replaced with the "GOOS/GOARCH" and ${bin} with the path to the compiled binary. The "GOOS/*" hook is executed before the "*/*" hook.]",
"*/*": "[The command that will be executed after every build: ${platform} is replaced with the "GOOS/GOARCH" and ${bin} with the path to the compiled binary.]"
},
"info": { // Data used to populate manifests and version info.
"companyName": "[The company name. Default: [The project name]]",
"productName": "[The product name. Default: [The project name]]",
"productVersion": "[The version of the product. Default: '1.0.0']",
"copyright": "[The copyright of the product. Default: 'Copyright.........']",
"comments": "[A short comment of the app. Default: 'Built using Wails (https://wails.app)']"
},
"nsisType": "['multiple': One installer per architecture. 'single': Single universal installer for all architectures being built. Default: 'multiple']",
"obfuscated": "[Whether the app should be obfuscated. Default: false]",
"garbleargs": "[The arguments to pass to the garble command when using the obfuscated flag]"
}
```
This file is read by the Wails CLI when running `wails build` or `wails dev`.
The `assetdir`, `reloaddirs`, `wailsjsdir`, `debounceMS`, `devserver` and `frontenddevserverurl` flags in `wails build/dev` will update the project config
and thus become defaults for subsequent runs.

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{
"label": "Runtime",
"position": 1
}

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sidebar_position: 7
---
# Browser
These methods are related to the system browser.
### BrowserOpenURL
Opens the given URL in the system browser.
Go: `BrowserOpenURL(ctx context.Context, url string)`<br/>
JS: `BrowserOpenURL(url string)`

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# Dialog
This part of the runtime provides access to native dialogs, such as File Selectors and Message boxes.
:::info Javascript
Dialog is currently unsupported in the JS runtime.
:::
### OpenDirectoryDialog
Opens a dialog that prompts the user to select a directory. Can be customised using [OpenDialogOptions](#opendialogoptions).
Go: `OpenDirectoryDialog(ctx context.Context, dialogOptions OpenDialogOptions) (string, error)`
Returns: Selected directory (blank if the user cancelled) or an error
### OpenFileDialog
Opens a dialog that prompts the user to select a file. Can be customised using [OpenDialogOptions](#opendialogoptions).
Go: `OpenFileDialog(ctx context.Context, dialogOptions OpenDialogOptions) (string, error)`
Returns: Selected file (blank if the user cancelled) or an error
### OpenMultipleFilesDialog
Opens a dialog that prompts the user to select multiple files. Can be customised using [OpenDialogOptions](#opendialogoptions).
Go: `OpenMultipleFilesDialog(ctx context.Context, dialogOptions OpenDialogOptions) ([]string, error)`
Returns: Selected files (nil if the user cancelled) or an error
### SaveFileDialog
Opens a dialog that prompts the user to select a filename for the purposes of saving. Can be customised using [SaveDialogOptions](#savedialogoptions).
Go: `SaveFileDialog(ctx context.Context, dialogOptions SaveDialogOptions) (string, error)`
Returns: The selected file (blank if the user cancelled) or an error
### MessageDialog
Displays a message using a message dialog. Can be customised using [MessageDialogOptions](#messagedialogoptions).
Go: `MessageDialog(ctx context.Context, dialogOptions MessageDialogOptions) (string, error)`
Returns: The text of the selected button or an error
## Options
### OpenDialogOptions
```go
type OpenDialogOptions struct {
DefaultDirectory string
DefaultFilename string
Title string
Filters []FileFilter
ShowHiddenFiles bool
CanCreateDirectories bool
ResolvesAliases bool
TreatPackagesAsDirectories bool
}
```
| Field | Description | Win | Mac | Lin |
| -------------------------- | ---------------------------------------------- | --- | --- | --- |
| DefaultDirectory | The directory the dialog will show when opened | ✅ | ✅ | ✅ |
| DefaultFilename | The default filename | ✅ | ✅ | ✅ |
| Title | Title for the dialog | ✅ | ✅ | ✅ |
| [Filters](#filefilter) | A list of file filters | ✅ | ✅ | ✅ |
| ShowHiddenFiles | Show files hidden by the system | | ✅ | ✅ |
| CanCreateDirectories | Allow user to create directories | | ✅ | |
| ResolvesAliases | If true, returns the file not the alias | | ✅ | |
| TreatPackagesAsDirectories | Allow navigating into packages | | ✅ | |
### SaveDialogOptions
```go
type SaveDialogOptions struct {
DefaultDirectory string
DefaultFilename string
Title string
Filters []FileFilter
ShowHiddenFiles bool
CanCreateDirectories bool
TreatPackagesAsDirectories bool
}
```
| Field | Description | Win | Mac | Lin |
| -------------------------- | ---------------------------------------------- | --- | --- | --- |
| DefaultDirectory | The directory the dialog will show when opened | ✅ | ✅ | ✅ |
| DefaultFilename | The default filename | ✅ | ✅ | ✅ |
| Title | Title for the dialog | ✅ | ✅ | ✅ |
| [Filters](#filefilter) | A list of file filters | ✅ | ✅ | ✅ |
| ShowHiddenFiles | Show files hidden by the system | | ✅ | ✅ |
| CanCreateDirectories | Allow user to create directories | | ✅ | |
| TreatPackagesAsDirectories | Allow navigating into packages | | ✅ | |
### MessageDialogOptions
```go
type MessageDialogOptions struct {
Type DialogType
Title string
Message string
Buttons []string
DefaultButton string
CancelButton string
}
```
| Field | Description | Win | Mac | Lin |
|---------------|----------------------------------------------------------------------------|----------------|-----|-----|
| Type | The type of message dialog, eg question, info... | ✅ | ✅ | ✅ |
| Title | Title for the dialog | ✅ | ✅ | ✅ |
| Message | The message to show the user | ✅ | ✅ | ✅ |
| Buttons | A list of button titles | | ✅ | |
| DefaultButton | The button with this text should be treated as default. Bound to `return`. | ✅[*](#windows) | ✅ | |
| CancelButton | The button with this text should be treated as cancel. Bound to `escape` | | ✅ | |
#### Windows
Windows has standard dialog types in which the buttons are not customisable.
The value returned will be one of: "Ok", "Cancel", "Abort", "Retry", "Ignore", "Yes", "No", "Try Again" or "Continue".
For Question dialogs, the default button is "Yes" and the cancel button is "No".
This can be changed by setting the `DefaultButton` value to `"No"`.
Example:
```go
result, err := runtime.MessageDialog(a.ctx, runtime.MessageDialogOptions{
Type: runtime.QuestionDialog,
Title: "Question",
Message: "Do you want to continue?",
DefaultButton: "No",
})
```
#### Linux
Linux has standard dialog types in which the buttons are not customisable.
The value returned will be one of: "Ok", "Cancel", "Yes", "No"
#### Mac
A message dialog on Mac may specify up to 4 buttons. If no `DefaultButton` or `CancelButton` is given, the first button
is considered default and is bound to the `return` key.
For the following code:
```go
selection, err := runtime.MessageDialog(b.ctx, runtime.MessageDialogOptions{
Title: "It's your turn!",
Message: "Select a number",
Buttons: []string{"one", "two", "three", "four"},
})
```
the first button is shown as default:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/runtime/dialog_no_defaults.png").default}
width="30%"
class="screenshot"
/>
</div>
<br />
```
And if we specify `DefaultButton` to be "two":
```go
selection, err := runtime.MessageDialog(b.ctx, runtime.MessageDialogOptions{
Title: "It's your turn!",
Message: "Select a number",
Buttons: []string{"one", "two", "three", "four"},
DefaultButton: "two",
})
```
the second button is shown as default. When `return` is pressed, the value "two" is returned.
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/runtime/dialog_default_button.png").default}
width="30%"
class="screenshot"
/>
</div>
<br />
```
If we now specify `CancelButton` to be "three":
```go
selection, err := runtime.MessageDialog(b.ctx, runtime.MessageDialogOptions{
Title: "It's your turn!",
Message: "Select a number",
Buttons: []string{"one", "two", "three", "four"},
DefaultButton: "two",
CancelButton: "three",
})
```
the button with "three" is shown at the bottom of the dialog. When `escape` is pressed, the value "three" is returned:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/runtime/dialog_default_cancel.png").default}
width="30%"
class="screenshot"
/>
</div>
<br />
<br />
<br />
```
#### DialogType
```go
const (
InfoDialog DialogType = "info"
WarningDialog DialogType = "warning"
ErrorDialog DialogType = "error"
QuestionDialog DialogType = "question"
)
```
### FileFilter
```go
type FileFilter struct {
DisplayName string // Filter information EG: "Image Files (*.jpg, *.png)"
Pattern string // semi-colon separated list of extensions, EG: "*.jpg;*.png"
}
```
#### Windows
Windows allows you to use multiple file filters in dialog boxes. Each FileFilter will show up as a separate entry in the
dialog:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/runtime/dialog_win_filters.png").default}
width="50%"
class="screenshot"
/>
</div>
<br />
<br />
<br />
```
#### Linux
Linux allows you to use multiple file filters in dialog boxes. Each FileFilter will show up as a separate entry in the
dialog:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/runtime/dialog_lin_filters.png").default}
width="50%"
class="screenshot"
/>
</div>
<br />
<br />
<br />
```
#### Mac
Mac dialogs only have the concept of a single set of patterns to filter files. If multiple FileFilters are provided,
Wails will use all the Patterns defined.
Example:
```go
selection, err := runtime.OpenFileDialog(b.ctx, runtime.OpenDialogOptions{
Title: "Select File",
Filters: []runtime.FileFilter{
{
DisplayName: "Images (*.png;*.jpg)",
Pattern: "*.png;*.jpg",
}, {
DisplayName: "Videos (*.mov;*.mp4)",
Pattern: "*.mov;*.mp4",
},
},
})
```
This will result in the Open File dialog using `*.png,*.jpg,*.mov,*.mp4` as a filter.

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---
sidebar_position: 2
---
# Events
The Wails runtime provides a unified events system, where events can be emitted or received by either Go or Javascript.
Optionally, data may be passed with the events. Listeners will receive the data in the local data types.
### EventsOn
This method sets up a listener for the given event name. When an event of type `eventName` is [emitted](#EventsEmit),
the callback is triggered. Any additional data sent with the emitted event will be passed to the callback.
Go: `EventsOn(ctx context.Context, eventName string, callback func(optionalData ...interface{}))`<br/>
JS: `EventsOn(eventName string, callback function(optionalData?: any))`
### EventsOff
This method unregisters the listener for the given event name, optionally multiple listeneres can be unregistered via `additionalEventNames`.
Go: `EventsOff(ctx context.Context, eventName string, additionalEventNames ...string)`<br/>
JS: `EventsOff(eventName string, ...additionalEventNames)`
### EventsOnce
This method sets up a listener for the given event name, but will only trigger once.
Go: `EventsOnce(ctx context.Context, eventName string, callback func(optionalData ...interface{}))`<br/>
JS: `EventsOnce(eventName string, callback function(optionalData?: any))`
### EventsOnMultiple
This method sets up a listener for the given event name, but will only trigger a maximum of `counter` times.
Go: `EventsOnMultiple(ctx context.Context, eventName string, callback func(optionalData ...interface{}), counter int)`<br/>
JS: `EventsOnMultiple(eventName string, callback function(optionalData?: any), counter int)`
### EventsEmit
This method emits the given event. Optional data may be passed with the event. This will trigger any event listeners.
Go: `EventsEmit(ctx context.Context, eventName string, optionalData ...interface{})`<br/>
JS: `EventsEmit(ctx context, optionalData function(optionalData?: any))`

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---
sidebar_position: 1
---
# Introduction
The runtime is a library that provides utility methods for your application. There is both a Go and Javascript runtime
and the aim is to try and keep them at parity where possible.
It has utility methods for:
- [Window](window.mdx)
- [Menu](menu.mdx)
- [Dialog](dialog.mdx)
- [Events](events.mdx)
- [Browser](browser.mdx)
- [Log](log.mdx)
The Go Runtime is available through importing `github.com/wailsapp/wails/v2/pkg/runtime`. All methods in this package
take a context as the first parameter. This context should be obtained from the [OnStartup](../options.mdx#onstartup)
or [OnDomReady](../options.mdx#ondomready) hooks.
:::info Note
Whilst the context will be provided to the
[OnStartup](../options.mdx#onstartup) method, there's no guarantee the runtime will work in this method as
the window is initialising in a different thread. If
you wish to call runtime methods at startup, use [OnDomReady](../options.mdx#ondomready).
:::
The Javascript library is available to the frontend via the `window.runtime` map. There is a runtime package generated when using `dev`
mode that provides Typescript declarations for the runtime. This should be located in the `wailsjs` directory in your
frontend directory.
### Hide
Go: `Hide(ctx context.Context)`<br/>
JS: `Hide()`
Hides the application.
:::info Note
On Mac, this will hide the application in the same way as the `Hide` menu item in standard Mac applications.
This is different to hiding the window, but the application still being in the foreground.
For Windows and Linux, this is currently the same as `WindowHide`.
:::
### Show
Shows the application.
:::info Note
On Mac, this will bring the application back into the foreground.
For Windows and Linux, this is currently the same as `WindowShow`.
:::
Go: `Show(ctx context.Context)`<br/>
JS: `Show()`
### Quit
Quits the application.
Go: `Quit(ctx context.Context)`<br/>
JS: `Quit()`
### Environment
Returns details of the current environment.
Go: `Environment(ctx context.Context) EnvironmentInfo`<br/>
JS: `Environment(): Promise<EnvironmentInfo>`
#### EnvironmentInfo
Go:
```go
type EnvironmentInfo struct {
BuildType string
Platform string
Arch string
}
```
JS:
```ts
interface EnvironmentInfo {
buildType: string;
platform: string;
arch: string;
}
```

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---
sidebar_position: 3
---
# Log
The Wails runtime provides a logging mechanism that may be called from Go or Javascript. Like most
loggers, there are a number of log levels:
- Trace
- Debug
- Info
- Warning
- Error
- Fatal
The logger will output any log message at the current, or higher, log level. Example: The `Debug` log
level will output all messages except `Trace` messages.
### LogPrint
Logs the given message as a raw message.
Go: `LogPrint(ctx context.Context, message string)`<br/>
JS: `LogPrint(message: string)`
### LogPrintf
Logs the given message as a raw message.
Go: `LogPrintf(ctx context.Context, format string, args ...interface{})`<br/>
### LogTrace
Logs the given message at the `Trace` log level.
Go: `LogTrace(ctx context.Context, message string)`<br/>
JS: `LogTrace(message: string)`
### LogTracef
Logs the given message at the `Trace` log level.
Go: `LogTracef(ctx context.Context, format string, args ...interface{})`<br/>
### LogDebug
Logs the given message at the `Debug` log level.
Go: `LogDebug(ctx context.Context, message string)`<br/>
JS: `LogDebug(message: string)`
### LogDebugf
Logs the given message at the `Debug` log level.
Go: `LogDebugf(ctx context.Context, format string, args ...interface{})`<br/>
### LogInfo
Logs the given message at the `Info` log level.
Go: `LogInfo(ctx context.Context, message string)`<br/>
JS: `LogInfo(message: string)`
### LogInfof
Logs the given message at the `Info` log level.
Go: `LogInfof(ctx context.Context, format string, args ...interface{})`<br/>
### LogWarning
Logs the given message at the `Warning` log level.
Go: `LogWarning(ctx context.Context, message string)`<br/>
JS: `LogWarning(message: string)`
### LogWarningf
Logs the given message at the `Warning` log level.
Go: `LogWarningf(ctx context.Context, format string, args ...interface{})`<br/>
### LogError
Logs the given message at the `Error` log level.
Go: `LogError(ctx context.Context, message string)`<br/>
JS: `LogError(message: string)`
### LogErrorf
Logs the given message at the `Error` log level.
Go: `LogErrorf(ctx context.Context, format string, args ...interface{})`<br/>
### LogFatal
Logs the given message at the `Fatal` log level.
Go: `LogFatal(ctx context.Context, message string)`<br/>
JS: `LogFatal(message: string)`
### LogFatalf
Logs the given message at the `Fatal` log level.
Go: `LogFatalf(ctx context.Context, format string, args ...interface{})`<br/>
### LogSetLogLevel
Sets the log level. In Javascript, the number relates to the following log levels:
| Value | Log Level |
| ----- | --------- |
| 1 | Trace |
| 2 | Debug |
| 3 | Info |
| 4 | Warning |
| 5 | Error |
Go: `LogSetLogLevel(ctx context.Context, level logger.LogLevel)`<br/>
JS: `LogSetLogLevel(level: number)`
## Using a Custom Logger
A custom logger may be used by providing it using the [Logger](../options.mdx#logger)
application option. The only requirement is that the logger implements the `logger.Logger` interface
defined in `github.com/wailsapp/wails/v2/pkg/logger`:
```go title="logger.go"
type Logger interface {
Print(message string)
Trace(message string)
Debug(message string)
Info(message string)
Warning(message string)
Error(message string)
Fatal(message string)
}
```

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---
sidebar_position: 6
---
# Menu
These methods are related to the application menu.
:::info Javascript
Menu is currently unsupported in the JS runtime.
:::
### MenuSetApplicationMenu
Sets the application menu to the given [menu](../menus.mdx).
Go: `MenuSetApplicationMenu(ctx context.Context, menu *menu.Menu)`
### MenuUpdateApplicationMenu
Updates the application menu, picking up any changes to the menu passed to `MenuSetApplicationMenu`.
Go: `MenuUpdateApplicationMenu(ctx context.Context)`

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# Window
These methods give control of the application window.
### WindowSetTitle
Sets the text in the window title bar.
Go: `WindowSetTitle(ctx context.Context, title string)`<br/>
JS: `WindowSetTitle(title: string)`
### WindowFullscreen
Makes the window full screen.
Go: `WindowFullscreen(ctx context.Context)`<br/>
JS: `WindowFullscreen()`
### WindowUnfullscreen
Restores the previous window dimensions and position prior to full screen.
Go: `WindowUnfullscreen(ctx context.Context)`<br/>
JS: `WindowUnfullscreen()`
### WindowIsFullscreen
Returns true if the window is full screen.
Go: `WindowIsFullscreen(ctx context.Context) bool`<br/>
JS: `WindowIsFullscreen() bool`
### WindowCenter
Centers the window on the monitor the window is currently on.
Go: `WindowCenter(ctx context.Context)`<br/>
JS: `WindowCenter()`
### WindowExecJS
Executes arbitrary JS code in the window.
This method runs the code in the browser asynchronously and returns immediately.
If the script causes any errors, they will only be available in the browser console.
Go: `WindowExecJS(ctx context.Context, js string)`
### WindowReload
Performs a "reload" (Reloads current page).
Go: `WindowReload(ctx context.Context)`<br/>
JS: `WindowReload()`
### WindowReloadApp
Reloads the application frontend.
Go: `WindowReloadApp(ctx context.Context)`<br/>
JS: `WindowReloadApp()`
### WindowSetSystemDefaultTheme
Windows only.
Go: `WindowSetSystemDefaultTheme(ctx context.Context)`<br/>
JS: `WindowSetSystemDefaultTheme()`
Sets window theme to system default (dark/light).
### WindowSetLightTheme
Windows only.
Go: `WindowSetLightTheme(ctx context.Context)`<br/>
JS: `WindowSetLightTheme()`
Sets window theme to light.
### WindowSetDarkTheme
Windows only.
Go: `WindowSetDarkTheme(ctx context.Context)`<br/>
JS: `WindowSetDarkTheme()`
Sets window theme to dark.
### WindowShow
Shows the window, if it is currently hidden.
Go: `WindowShow(ctx context.Context)`<br/>
JS: `WindowShow()`
### WindowHide
Hides the window, if it is currently visible.
Go: `WindowHide(ctx context.Context)`<br/>
JS: `WindowHide()`
### WindowIsNormal
Returns true if the window not minimised, maximised or fullscreen.
Go: `WindowIsNormal(ctx context.Context) bool`<br/>
JS: `WindowIsNormal() bool`
### WindowSetSize
Sets the width and height of the window.
Go: `WindowSetSize(ctx context.Context, width int, height int)`<br/>
JS: `WindowSetSize(size: Size)`
### WindowGetSize
Gets the width and height of the window.
Go: `WindowGetSize(ctx context.Context) (width int, height int)`<br/>
JS: `WindowGetSize() : Size`
### WindowSetMinSize
Sets the minimum window size.
Will resize the window if the window is currently smaller than the given dimensions.
Setting a size of `0,0` will disable this constraint.
Go: `WindowSetMinSize(ctx context.Context, width int, height int)`<br/>
JS: `WindowSetMinSize(size: Size)`
### WindowSetMaxSize
Sets the maximum window size.
Will resize the window if the window is currently larger than the given dimensions.
Setting a size of `0,0` will disable this constraint.
Go: `WindowSetMaxSize(ctx context.Context, width int, height int)`<br/>
JS: `WindowSetMaxSize(size: Size)`
### WindowSetAlwaysOnTop
Sets the window AlwaysOnTop or not on top.
Go: `WindowSetAlwaysOnTop(ctx context.Context, b bool)`<br/>
JS: `WindowSetAlwaysOnTop(b: Boolen)`
### WindowSetPosition
Sets the window position relative to the monitor the window is currently on.
Go: `WindowSetPosition(ctx context.Context, x int, y int)`<br/>
JS: `WindowSetPosition(position: Position)`
### WindowGetPosition
Gets the window position relative to the monitor the window is currently on.
Go: `WindowGetPosition(ctx context.Context) (x int, y int)`<br/>
JS: `WindowGetPosition() : Position`
### WindowMaximise
Maximises the window to fill the screen.
Go: `WindowMaximise(ctx context.Context)`<br/>
JS: `WindowMaximise()`
### WindowUnmaximise
Restores the window to the dimensions and position prior to maximising.
Go: `WindowUnmaximise(ctx context.Context)`<br/>
JS: `WindowUnmaximise()`
### WindowIsMaximised
Returns true if the window is maximised.
Go: `WindowIsMaximised(ctx context.Context) bool`<br/>
JS: `WindowIsMaximised() bool`
### WindowToggleMaximise
Toggles between Maximised and UnMaximised.
Go: `WindowToggleMaximise(ctx context.Context)`<br/>
JS: `WindowToggleMaximise()`
### WindowMinimise
Minimises the window.
Go: `WindowMinimise(ctx context.Context)`<br/>
JS: `WindowMinimise()`
### WindowUnminimise
Restores the window to the dimensions and position prior to minimising.
Go: `WindowUnminimise(ctx context.Context)`<br/>
JS: `WindowUnminimise()`
### WindowIsMinimised
Returns true if the window is minimised.
Go: `WindowIsMinimised(ctx context.Context) bool`<br/>
JS: `WindowIsMinimised() bool`
### WindowSetBackgroundColour
Sets the background colour of the window to the given RGBA colour definition.
This colour will show through for all transparent pixels.
Valid values for R, G, B and A are 0-255.
:::info Windows
On Windows, only alpha values of 0 or 255 are supported.
Any value that is not 0 will be considered 255.
:::
Go: `WindowSetBackgroundColour(ctx context.Context, R, G, B, A uint8)`<br/>
JS: `WindowSetBackgroundColour(R, G, B, A)`
## Typescript Object Definitions
### Position
```ts
interface Position {
x: number;
y: number;
}
```
### Size
```ts
interface Size {
w: number;
h: number;
}
```

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{
"label": "Tutorials",
"position": 70
}

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---
sidebar_position: 20
---
# Dogs API
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/tutorials/dogsapi/img.webp").default}
width="50%"
className="screenshot"
/>
</div>
<br />
```
:::note
This tutorial has been kindly provided by [@tatadan](https://twitter.com/tatadan) and forms part of
their [Wails Examples Repository](https://github.com/tataDan/wails-v2-examples).
:::
In this tutorial we are going to develop an application that retrieves photos of dogs from the web
and then displays them.
### Create the project
Let's create the application. From a terminal enter:
`wails init -n dogs-api -t svelte`
Note: We could optionally add `-ide vscode` or `-ide goland` to the end of this command if you wanted
to add IDE support.
Now let's `cd dogs-api` and start editing the project files.
### Remove unused code
We will start by removing some elements that we know we will not use:
- Open `app.go` and remove the following lines:
```go
// Greet returns a greeting for the given name
func (a *App) Greet(name string) string {
return fmt.Sprintf("Hello %s, It's show time!", name)
}
```
- Open `frontend/src/App.svelte` and delete all lines.
- Delete the `frontend/src/assets/images/logo-universal.png` file
### Creating our application
Now let's add our new Go code.
Add the following struct declarations to `app.go` before the function definitions:
```go
type RandomImage struct {
Message string
Status string
}
type AllBreeds struct {
Message map[string]map[string][]string
Status string
}
type ImagesByBreed struct {
Message []string
Status string
}
```
Add the following functions to `app.go` (perhaps after the existing function definitions):
```go
func (a *App) GetRandomImageUrl() string {
response, err := http.Get("https://dog.ceo/api/breeds/image/random")
if err != nil {
log.Fatal(err)
}
responseData, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal(err)
}
var data RandomImage
json.Unmarshal(responseData, &data)
return data.Message
}
func (a *App) GetBreedList() []string {
var breeds []string
response, err := http.Get("https://dog.ceo/api/breeds/list/all")
if err != nil {
log.Fatal(err)
}
responseData, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal(err)
}
var data AllBreeds
json.Unmarshal(responseData, &data)
for k := range data.Message {
breeds = append(breeds, k)
}
sort.Strings(breeds)
return breeds
}
func (a *App) GetImageUrlsByBreed(breed string) []string {
url := fmt.Sprintf("%s%s%s%s", "https://dog.ceo/api/", "breed/", breed, "/images")
response, err := http.Get(url)
if err != nil {
log.Fatal(err)
}
responseData, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal(err)
}
var data ImagesByBreed
json.Unmarshal(responseData, &data)
return data.Message
}
```
Modify the `import` section of `app.go` to look like this:
```go
import (
"context"
"fmt"
"encoding/json"
"io/ioutil"
"log"
"net/http"
"sort"
)
```
Add the following lines to `frontend/src/App.svelte`:
<!-- prettier-ignore-start -->
```html
<script>
import { GetRandomImageUrl } from "../wailsjs/go/main/App.js";
import { GetBreedList } from "../wailsjs/go/main/App.js";
import { GetImageUrlsByBreed } from "../wailsjs/go/main/App.js";
let randomImageUrl = "";
let breeds = [];
let photos = [];
let selectedBreed;
let showRandomPhoto = false;
let showBreedPhotos = false;
function init() {
getBreedList();
}
init();
function getRandomImageUrl() {
showRandomPhoto = false;
showBreedPhotos = false;
GetRandomImageUrl().then((result) => (randomImageUrl = result));
showRandomPhoto = true;
}
function getBreedList() {
GetBreedList().then((result) => (breeds = result));
}
function getImageUrlsByBreed() {
init();
showRandomPhoto = false;
showBreedPhotos = false;
GetImageUrlsByBreed(selectedBreed).then((result) => (photos = result));
showBreedPhotos = true;
}
</script>
<h3>Dogs API</h3>
<div>
<button class="btn" on:click={getRandomImageUrl}>
Fetch a dog randomly
</button>
Click on down arrow to select a breed
<select bind:value={selectedBreed}>
{#each breeds as breed}
<option value={breed}>
{breed}
</option>
{/each}
</select>
<button class="btn" on:click={getImageUrlsByBreed}>
Fetch by this breed
</button>
</div>
<br />
{#if showRandomPhoto}
<img id="random-photo" src={randomImageUrl} alt="No dog found" />
{/if}
{#if showBreedPhotos}
{#each photos as photo}
<img id="breed-photos" src={photo} alt="No dog found" />
{/each}
{/if}
<style>
#random-photo {
width: 600px;
height: auto;
}
#breed-photos {
width: 300px;
height: auto;
}
.btn:focus {
border-width: 3px;
}
</style>
```
<!-- prettier-ignore-end -->
### Testing the application
To generate the bindings and test the application, run `wails dev`.
### Compiling the application
To compile the application to a single, production grade binary, run `wails build`.

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@ -1,126 +0,0 @@
---
sidebar_position: 10
---
# Hello World
The aim of this tutorial is to get you up and running with the most basic
application using Wails. You will be able to:
- Create a new Wails application
- Build the application
- Run the application
:::note
This tutorial uses Windows as the target platform. Output will vary slightly
depending on your operating system.
:::
## Create a new Wails application
To create a new Wails application using the default vanilla JS template,
you need to run the following command:
```bash
wails init -n helloworld
```
You should see something similar to the following:
```
Wails CLI v2.0.0
Initialising Project 'helloworld'
---------------------------------
Project Name: helloworld
Project Directory: C:\Users\leaan\tutorial\helloworld
Project Template: vanilla
Template Support: https://wails.io
Initialised project 'helloworld' in 232ms.
```
This will create a new directory called `helloworld` in the current directory.
In this directory, you will find a number of files:
```
build/ - Contains the build files + compiled application
frontend/ - Contains the frontend files
app.go - Contains the application code
main.go - The main program with the application configuration
wails.json - The project configuration file
go.mod - The go module file
go.sum - The go module checksum file
```
## Build the application
To build the application, change to the new `helloworld` project directory and run the following command:
```bash
wails build
```
You should see something like the following:
```
Wails CLI v2.0.0
App Type: desktop
Platforms: windows/amd64
Compiler: C:\Users\leaan\go\go1.18.3\bin\go.exe
Build Mode: Production
Skip Frontend: false
Compress: false
Package: true
Clean Build Dir: false
LDFlags: ""
Tags: []
Race Detector: false
Building target: windows/amd64
------------------------------
- Installing frontend dependencies: Done.
- Compiling frontend: Done.
- Generating bundle assets: Done.
- Compiling application: Done.
Built 'C:\Users\leaan\tutorial\helloworld\build\bin\helloworld.exe' in 10.616s.
```
This has compiled the application and saved it in the `build/bin` directory.
## Run the application
If we view the `build/bin` directory in Windows Explorer, we should see our project binary:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/helloworld-app-icon.webp").default}
width="134px"
/>
</div>
<br />
```
We can run it by simply double-clicking the `helloworld.exe` file.
On Mac, Wails generates a `helloworld.app` file which can be run by double-clicking it.
On Linux, you can run the application using `./helloworld` from the `build/bin` directory.
You should see the application working as expected:
```mdx-code-block
<div class="text--center">
<img
src={require("@site/static/img/windows-default-app.webp").default}
width="50%"
className="screenshot"
/>
</div>
<br />
```

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@ -1,13 +0,0 @@
{
"docs": [
{
"type": "autogenerated",
"dirName": "."
},
{
"type": "link",
"label": "Contributing",
"href": "/community-guide#ways-of-contributing"
}
]
}

View File

@ -1,4 +1 @@
[
"v2.2.0",
"v2.1.0"
]
["v2.3.0","v2.2.0"]