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 ad06b34..d672d76 100644 (file)
--- a/resources/src/startup.js
+++ b/resources/src/startup.js
@@ -1,26 +1,23 @@
 /**
- * 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 Date.now(); };
-       }() ),
-       // 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>
@@ -63,7 +60,7 @@ 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
@@ -93,7 +90,7 @@ function isCompatible( str ) {
                        ua.match( /PlayStation/i )
                )
        );
-}
+};
 
 // Conditional script injection
 ( function () {
@@ -153,6 +150,9 @@ function isCompatible( str ) {
                };
        }
 
+       window.mediaWikiLoadStart = mwNow();
+       mwPerformance.mark( 'mwLoadStart' );
+
        script = document.createElement( 'script' );
        script.src = $VARS.baseModulesUri;
        script.onload = script.onreadystatechange = function () {