https://github.com/olso/go-wasm-cat-game-on-canvas-with-docker 🧶 https://olso.space 🧶 https://twitter.com/olso_uznebolo

cat_game.2.go

func main() {
	setup()

	// declare renderer at compile time
	var renderer js.Func
	// looks like JS callback, right 😌
	renderer = js.FuncOf(func(this js.Value, args []js.Value) interface{} {
		updateGame()
		// for the 60fps anims
		window.Call("requestAnimationFrame", renderer)
		return nil
	})
	window.Call("requestAnimationFrame", renderer)

	// let's handle that mouse/touch down
	var mouseEventHandler js.Func = js.FuncOf(func(this js.Value, args []js.Value) interface{} {
		updatePlayer(args[0])
		return nil
	})
	window.Call("addEventListener", "pointerdown", mouseEventHandler)
}

func updatePlayer(event js.Value) {}
func updateGame() {}