Merge pull request #4119 from mbaklor/v3-alpha

[V3] add ".html" to assetFileServer requests with no extension

docs/src/content/docs/changelog.mdx

@@ -107,6 +107,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -  Ensure menu updates occur on the main thread by [@leaanthony](https://github.com/leaanthony)
 - The dragging and resizing mechanism is now more robust and matches expected platform behaviour more closely by [@fbbdev](https://github.com/fbbdev) in [#4100](https://github.com/wailsapp/wails/pull/4100)
 - Fixed [#4097](https://github.com/wailsapp/wails/issues/4097) Webpack/angular discards runtime init code by [@fbbdev](https://github.com/fbbdev) in [#4100](https://github.com/wailsapp/wails/pull/4100)
+- Fixed assetFileServer not serving `.html` files when non-extension request when `[request]` doesn't exist but `[request].html` does
 
 ### Changed
 

v3/internal/assetserver/asset_fileserver.go

@@ -71,7 +71,15 @@ func (d *assetFileServer) serveFSFile(rw http.ResponseWriter, req *http.Request,
 
 	file, err := d.fs.Open(filename)
 	if err != nil {
-		return err
+		if s := path.Ext(filename); s == "" {
+			filename = filename + ".html"
+			file, err = d.fs.Open(filename)
+			if err != nil {
+				return err
+			}
+		} else {
+			return err
+		}
 	}
 	defer file.Close()