--- /dev/null
+/**
+ * This file is where we decide whether to initialise the Grade A 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, 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
+ *
+ * Browsers we support in our modern run-time (Grade A):
+ * - Chrome 13+
+ * - IE 11+
+ * - Firefox 4+
+ * - Safari 5+
+ * - Opera 15+
+ * - Mobile Safari 6.0+ (iOS 6+)
+ * - Android 4.1+
+ *
+ * Browsers we support in our no-javascript run-time (Grade C):
+ * - Chrome 1+
+ * - IE 6+
+ * - Firefox 3+
+ * - Safari 3+
+ * - Opera 15+
+ * - Mobile Safari 5.0+ (iOS 4+)
+ * - Android 2.0+
+ * - WebOS < 1.5
+ * - PlayStation
+ * - Symbian-based browsers
+ * - NetFront-based browser
+ * - Opera Mini
+ * - Nokia's Ovi Browser
+ * - MeeGo's browser
+ * - Google Glass
+ * - UC Mini (speed mode on)
+ *
+ * Other browsers that pass the check are considered Grade X.
+ *
+ * @param {string} [str] User agent, defaults to navigator.userAgent
+ * @return {boolean} User agent is compatible with MediaWiki JS
+ */
+window.isCompatible = function ( str ) {
+ var ua = str || navigator.userAgent;
+ return !!(
+ // https://caniuse.com/#feat=es5
+ // https://caniuse.com/#feat=use-strict
+ // https://caniuse.com/#feat=json / https://phabricator.wikimedia.org/T141344#2784065
+ ( function () {
+ 'use strict';
+ return !this && !!Function.prototype.bind && !!window.JSON;
+ }() ) &&
+
+ // https://caniuse.com/#feat=queryselector
+ 'querySelector' in document &&
+
+ // https://caniuse.com/#feat=namevalue-storage
+ // https://developer.blackberry.com/html5/apis/v1_0/localstorage.html
+ // https://blog.whatwg.org/this-week-in-html-5-episode-30
+ 'localStorage' in window &&
+
+ // https://caniuse.com/#feat=addeventlistener
+ 'addEventListener' in window &&
+
+ // 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( /MSIE 10|webOS\/1\.[0-4]|SymbianOS|Series60|NetFront|Opera Mini|S40OviBrowser|MeeGo|Android.+Glass|^Mozilla\/5\.0 .+ Gecko\/$|googleweblight/ ) ||
+ ua.match( /PlayStation/i )
+ )
+ );
+};
+
+// Conditional script injection
+( function () {
+ var NORLQ, script;
+ if ( !isCompatible() ) {
+ // Undo class swapping in case of an unsupported browser.
+ // See ResourceLoaderClientHtml::getDocumentAttributes().
+ document.documentElement.className = document.documentElement.className
+ .replace( /(^|\s)client-js(\s|$)/, '$1client-nojs$2' );
+
+ NORLQ = window.NORLQ || [];
+ while ( NORLQ.length ) {
+ NORLQ.shift()();
+ }
+ window.NORLQ = {
+ push: function ( fn ) {
+ fn();
+ }
+ };
+
+ // Clear and disable the other queue
+ window.RLQ = {
+ // No-op
+ push: function () {}
+ };
+
+ return;
+ }
+
+ /**
+ * The $CODE and $VARS placeholders are substituted in ResourceLoaderStartUpModule.php.
+ */
+ function startUp() {
+ mw.config = new mw.Map( $VARS.wgLegacyJavaScriptGlobals );
+
+ $CODE.registrations();
+
+ mw.config.set( $VARS.configuration );
+
+ // Must be after mw.config.set because these callbacks may use mw.loader which
+ // needs to have values 'skin', 'debug' etc. from mw.config.
+ // eslint-disable-next-line vars-on-top
+ var RLQ = window.RLQ || [];
+ while ( RLQ.length ) {
+ RLQ.shift()();
+ }
+ window.RLQ = {
+ push: function ( fn ) {
+ fn();
+ }
+ };
+
+ // Clear and disable the other queue
+ window.NORLQ = {
+ // No-op
+ push: function () {}
+ };
+ }
+
+ window.mediaWikiLoadStart = mwNow();
+ mwPerformance.mark( 'mwLoadStart' );
+
+ script = document.createElement( 'script' );
+ script.src = $VARS.baseModulesUri;
+ script.onload = function () {
+ // Clean up
+ script.onload = null;
+ script = null;
+ // Callback
+ startUp();
+ };
+ document.head.appendChild( script );
+}() );
projects / weblabels.fsf.org.git / commitdiff