added customEvent to notifiy when the code is injected.

Author: alinz

ios/RCTWebViewBridge.m

@@ -286,6 +286,8 @@ - (NSString *)webViewBridgeScript {
       var RNWBSchema = 'wvb';
       var sendQueue = [];
       var receiveQueue = [];
+      var doc = window.document;
+      var customEvent = doc.createEvent('Event');
 
       function callFunc(func, message) {
         if ('function' === typeof func) {
@@ -340,6 +342,10 @@ function signalNative() {
       };
 
       window.WebViewBridge = WebViewBridge;
+
+      //dispatch event
+      customEvent.initEvent('WebViewBridge', true, true);
+      doc.dispatchEvent(customEvent);
     }(window));
   );
 }

scripts/webviewbridge.js

@@ -9,6 +9,8 @@
   var RNWBSchema = 'wvb';
   var sendQueue = [];
   var receiveQueue = [];
+  var doc = window.document;
+  var customEvent = doc.createEvent('Event');
 
   function callFunc(func, message) {
     if ('function' === typeof func) {
@@ -63,4 +65,8 @@
   };
 
   window.WebViewBridge = WebViewBridge;
+
+  //dispatch event
+  customEvent.initEvent('WebViewBridge', true, true);
+  doc.dispatchEvent(customEvent);
 }(window));