wails/v2/cmd/wails/internal/template/base/frontend/dist/main.js

// Get input + focus
let nameElement = document.getElementById("name");
nameElement.focus();

// Setup the greet function
window.greet = function () {
  // Get name
  let name = nameElement.value;

  // Check if the input is empty
  if (name === "") return;

  // Call App.Greet(name)
  try {
    window.go.main.App.Greet(name)
      .then((result) => {
        // Update result with data back from App.Greet()
        document.getElementById("result").innerText = result;
      })
      .catch((err) => {
        console.error(err);
      });
  } catch (err) {
    console.error(err);
  }
};

nameElement.onkeydown = function (e) {
  if (e.keyCode == 13) {
    window.greet();
  }
};