resourceloader: Optimise several map-like objects with Object.create(null)

[lhc/web/wiklou.git] / resources / src / mediawiki.base / mediawiki.base.js

diff --git a/resources/src/mediawiki.base/mediawiki.base.js b/resources/src/mediawiki.base/mediawiki.base.js
index 9536b67..284b21a 100644 (file)
--- a/resources/src/mediawiki.base/mediawiki.base.js
+++ b/resources/src/mediawiki.base/mediawiki.base.js
@@ -22,7 +22,6 @@
                mwLoaderTrack = mw.track,
                trackCallbacks = $.Callbacks( 'memory' ),
                trackHandlers = [],
-               hasOwn = Object.prototype.hasOwnProperty,
                queue;
 
        /**
@@ -401,7 +400,7 @@
         * @class mw.hook
         */
        mw.hook = ( function () {
-               var lists = {};
+               var lists = Object.create( null );
 
                /**
                 * Create an instance of mw.hook.
@@ -412,9 +411,7 @@
                 * @return {mw.hook}
                 */
                return function ( name ) {
-                       var list = hasOwn.call( lists, name ) ?
-                               lists[ name ] :
-                               lists[ name ] = $.Callbacks( 'memory' );
+                       var list = lists[ name ] || ( lists[ name ] = $.Callbacks( 'memory' ) );
 
                        return {
                                /**