/**
- * Code in this file MUST work on even the most ancient of browsers!
+ * This file is where we decide whether to initialise the Grade A run-time.
*
- * This file is where we decide whether to initialise the modern run-time.
+ * - Beware: This file MUST parse without errors on even the most ancient of browsers!
+ * - Beware: Do not call mwNow before the isCompatible() check.
*/
-/* global mw, $VARS, $CODE */
-
-var mwPerformance = ( window.performance && performance.mark ) ? performance : {
- mark: function () {}
- },
- // Define now() here to ensure valid comparison with mediaWikiLoadEnd (T153819).
- mwNow = ( function () {
- var perf = window.performance,
- navStart = perf && perf.timing && perf.timing.navigationStart;
- return navStart && typeof perf.now === 'function' ?
- function () { return navStart + perf.now(); } :
- function () { return +new Date(); };
- }() ),
- // eslint-disable-next-line no-unused-vars
- mediaWikiLoadStart = mwNow();
-
-mwPerformance.mark( 'mwLoadStart' );
+/* global mw, mwPerformance, mwNow, isCompatible, $VARS, $CODE */
+
+window.mwPerformance = ( window.performance && performance.mark ) ? performance : {
+ mark: function () {}
+};
+// Define now() here to ensure valid comparison with mediaWikiLoadEnd (T153819).
+window.mwNow = ( function () {
+ var perf = window.performance,
+ navStart = perf && perf.timing && perf.timing.navigationStart;
+ return navStart && typeof perf.now === 'function' ?
+ function () { return navStart + perf.now(); } :
+ function () { return Date.now(); };
+}() );
/**
* See <https://www.mediawiki.org/wiki/Compatibility#Browsers>
*
* Capabilities required for modern run-time:
+ * - ECMAScript 5
* - DOM Level 4 & Selectors API Level 1
* - HTML5 & Web Storage
* - DOM Level 2 Events
- * - JSON
*
* Browsers we support in our modern run-time (Grade A):
- * - Chrome 4+
- * - IE 9+
- * - Firefox 3.5+
+ * - Chrome 13+
+ * - IE 10+
+ * - Firefox 4+
* - Safari 5+
- * - Opera 10.5+
- * - Mobile Safari (iOS 4+)
- * - Android 2.0+
+ * - Opera 12.10+
+ * - Mobile Safari 5.1+ (iOS 5+)
+ * - Android 4.1+
*
* Browsers we support in our no-javascript run-time (Grade C):
* - Chrome 1+
* - Firefox 3+
* - Safari 3+
* - Opera 10+
+ * - Mobile Safari 5.0+ (iOS 4+)
+ * - Android 2.0+
* - WebOS < 1.5
* - PlayStation
* - Symbian-based browsers
* @param {string} [str] User agent, defaults to navigator.userAgent
* @return {boolean} User agent is compatible with MediaWiki JS
*/
-function isCompatible( str ) {
+window.isCompatible = function ( str ) {
var ua = str || navigator.userAgent;
return !!(
+ // http://caniuse.com/#feat=es5
+ // http://caniuse.com/#feat=use-strict
+ // http://caniuse.com/#feat=json / https://phabricator.wikimedia.org/T141344#2784065
+ ( function () {
+ 'use strict';
+ return !this && !!Function.prototype.bind && !!window.JSON;
+ }() ) &&
+
// http://caniuse.com/#feat=queryselector
'querySelector' in document &&
// http://caniuse.com/#feat=addeventlistener
'addEventListener' in window &&
- // http://caniuse.com/#feat=json
- // https://phabricator.wikimedia.org/T141344#2784065
- ( window.JSON && JSON.stringify && JSON.parse ) &&
-
// Hardcoded exceptions for browsers that pass the requirement but we don't want to
// support in the modern run-time.
// Note: Please extend the regex instead of adding new ones
ua.match( /PlayStation/i )
)
);
-}
+};
// Conditional script injection
( function () {
};
}
+ window.mediaWikiLoadStart = mwNow();
+ mwPerformance.mark( 'mwLoadStart' );
+
script = document.createElement( 'script' );
script.src = $VARS.baseModulesUri;
script.onload = script.onreadystatechange = function () {