t.Errorf("got %#v, want %#v", got, 42)
		}
		c <- struct{}{}
		return nil
	})
	defer cb.Release()
	js.Global().Call("setTimeout", cb, 0, 42)
	<-c
}

func TestInvokeFunction(t *testing.T) {
	called := false
	cb := js.FuncOf(func(this js.Value, args []js.Value) any {
		cb2 := js.FuncOf(func(this js.Value, args []js.Value) any {
			called = true
			return 42
		})