reintroduce declarative recipient by messenger user

- automatic declaration is not possible due to browser security restriction about accessing cross domain object

Author: ldbglobe

example/static/index.html

@@ -25,15 +25,17 @@
         </div>
 
         <script>
+        var messenger = new Messenger({channel:'general'}) // subscribe to "general" as default channel
+
         function openChild() {
-            window.open(
+            var w = window.open(
                 '?',
                 (()=>([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,a=>(a^Math.random()*16>>a/4).toString(16)))(),
                 'resizable=yes,scrollbars=yes,dependent=yes,width=500,height=250'
             );
+            messenger.addRecipient(w)
         }
 
-        var messenger = new Messenger({channel:'general'}) // subscribe to "general" as default channel
         messenger.subscribe('A')
         messenger.subscribe('B')
 

src/index.js

@@ -1,16 +1,5 @@
 import EventDispatcher from "js-class.event-dispatcher";
 
-window.MessengerWelcome_260b9b39071b9918 = function(w=null)
-{
-	if(w)
-		Messenger.___.recipients.add(w)
-	else
-	{
-		if(window.opener && typeof window.opener.MessengerWelcome_260b9b39071b9918 === "function")
-			window.opener.MessengerWelcome_260b9b39071b9918(window);
-	}
-}
-
 export default class Messenger {
 
 	static ___ = {
@@ -31,8 +20,10 @@ export default class Messenger {
 
 		this.events = new EventDispatcher(this);
 		window.addEventListener('message', this.__handleMessage.bind(this))
+	}
 
-		window.MessengerWelcome_260b9b39071b9918();
+	addRecipient(recipientWindow) {
+		Messenger.___.recipients.add(recipientWindow)
 	}
 
 	subscribe(channel) {