@@ -0,0 +1,255 @@
+package com.example.client;%0A%0Aimport jsinterop.annotations.JsPackage;%0Aimport jsinterop.annotations.JsType;%0A%0A@JsType(namespace = JsPackage.GLOBAL, name = %22window%22, isNative = true)%0Apublic class Window %7B%0A%0A%09public static native void alert(String message);%0A%0A%7D%0A

Add window emulation