Ticket #31412: 31412.22.patch

src/wp-includes/js/mce-view.js

@@ -467 +467 @@
                                 var dom = editor.dom,
                                         styles = '',
                                         bodyClasses = editor.getBody().className || '',
-                                        iframe, iframeDoc, observer, i, resize;
+                                        iframe, iframeDoc, observer, i;
 
                                 content.innerHTML = '';
                                 head = head || '';
@@ -543 +543 @@
 
                                         iframeDoc.close();
 
-                                        resize = function() {
+                                        function resize() {
                                                 var $iframe, iframeDocHeight;
 
                                                 // Make sure the iframe still exists.
@@ -556 +556 @@
                                                                 editor.nodeChanged();
                                                         }
                                                 }
-                                        };
+                                        }
 
                                         if ( MutationObserver ) {
-                                                observer = new MutationObserver( _.debounce( function() {
-                                                        resize();
-                                                }, 100 ) );
+                                                observer = new MutationObserver( _.debounce( resize, 100 ) );
 
                                                 observer.observe( iframeDoc.body, {
                                                         attributes: true,
                                                         childList: true,
                                                         subtree: true
                                                 } );
+
+                                                $( node ).one( 'wp-mce-view-unbind', function() {
+                                                        observer.disconnect();
+                                                } );
                                         } else {
                                                 for ( i = 1; i < 6; i++ ) {
                                                         setTimeout( resize, i * 700 );
@@ -580 +582 @@
 
                                         if ( importStyles ) {
                                                 editor.on( 'wp-body-class-change', classChange );
-                                        }
 
-                                        $( node ).one( 'wp-mce-view-unbind', function() {
-                                                observer.disconnect();
-                                                editor.off( 'wp-body-class-change', classChange );
-                                        } );
+                                                $( node ).one( 'wp-mce-view-unbind', function() {
+                                                        editor.off( 'wp-body-class-change', classChange );
+                                                } );
+                                        }
                                 }, 50 );
 
                                 callback && callback.apply( this, arguments );