Ticket #34698: 34698.2.diff

src/wp-includes/js/wp-embed.js

@@ -1 +1 @@
 (function ( window, document ) {
         'use strict';
 
-        var supportedBrowser = ( document.querySelector && window.addEventListener ),
+        var supportedBrowser = false,
                 loaded = false;
 
+                if ( document.querySelector ) {
+                        if ( window.addEventListener ) {
+                                supportedBrowser = true;
+                        }
+                }
+
         window.wp = window.wp || {};
 
         if ( !! window.wp.receiveEmbedMessage ) {
@@ -50 +56 @@
                                 targetURL.href = data.value;
 
                                 /* Only continue if link hostname matches iframe's hostname. */
-                                if ( targetURL.host === sourceURL.host && document.activeElement === source ) {
-                                        window.top.location.href = data.value;
+                                if ( targetURL.host === sourceURL.host ) {
+                                        if ( document.activeElement === source ) {
+                                                window.top.location.href = data.value;
+                                        }
                                 }
                         }
                 }
@@ -85 +93 @@
                         }
 
                         /* Remove security attribute from iframes in IE10 and IE11. */
-                        if ( ( isIE10 || isIE11 ) && !!source.getAttribute( 'security' ) ) {
-                                iframeClone = source.cloneNode( true );
-                                iframeClone.removeAttribute( 'security' );
-                                source.parentNode.replaceChild( iframeClone, source );
+                        if ( ( isIE10 || isIE11 ) ) {
+                                if ( !!source.getAttribute( 'security' ) ) {
+                                        iframeClone = source.cloneNode( true );
+                                        iframeClone.removeAttribute( 'security' );
+                                        source.parentNode.replaceChild( iframeClone, source );
+                                }
                         }
                 }
         }