Ticket #24736: 24736.patch

wp-admin/js/revisions.js

@@ -12 +12 @@
         revisions.debug = true;
 
         revisions.log = function() {
-                if ( revisions.debug )
+                if ( window.console && revisions.debug )
                         console.log.apply( console, arguments );
         };
 
@@ -342 +342 @@
                         properties.baseUrl = revisions.settings.baseUrl;
                         this.set( properties );
 
-                        // Start the router
-                        this.router = new revisions.Router({ model: this });
-                        Backbone.history.start({ pushState: true });
+                        // Start the router if browser supports History API
+                        if ( window.history && window.history.pushState ) {
+                                this.router = new revisions.Router({ model: this });
+                                Backbone.history.start({ pushState: true });
+                        }
                 },
 
                 updateLoadingStatus: function() {