Merge "Add 3D filetype for STL files"

[lhc/web/wiklou.git] / resources / src / startup.js

diff --git a/resources/src/startup.js b/resources/src/startup.js
index deb280a..d672d76 100644 (file)
--- a/resources/src/startup.js
+++ b/resources/src/startup.js
@@ -1,44 +1,41 @@
 /**
- * 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+
@@ -46,6 +43,8 @@ mwPerformance.mark( 'mwLoadStart' );
  * - Firefox 3+
  * - Safari 3+
  * - Opera 10+
+ * - Mobile Safari 5.0+ (iOS 4+)
+ * - Android 2.0+
  * - WebOS < 1.5
  * - PlayStation
  * - Symbian-based browsers
@@ -61,9 +60,17 @@ mwPerformance.mark( 'mwLoadStart' );
  * @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 &&
 
@@ -75,10 +82,6 @@ function isCompatible( str ) {
                // 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
@@ -87,7 +90,7 @@ function isCompatible( str ) {
                        ua.match( /PlayStation/i )
                )
        );
-}
+};
 
 // Conditional script injection
 ( function () {
@@ -147,6 +150,9 @@ function isCompatible( str ) {
                };
        }
 
+       window.mediaWikiLoadStart = mwNow();
+       mwPerformance.mark( 'mwLoadStart' );
+
        script = document.createElement( 'script' );
        script.src = $VARS.baseModulesUri;
        script.onload = script.onreadystatechange = function () {