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/**
* Code in this file MUST work on even the most ancient of browsers!
*
* This file is where we decide whether to initialise the modern run-time.
*/
/*jshint unused: false, evil: true */
/*globals mw, RLQ: true, NORLQ: true, $VARS, $CODE, performance */
var mediaWikiLoadStart = ( new Date() ).getTime(),
mwPerformance = ( window.performance && performance.mark ) ? performance : {
mark: function () {}
};
mwPerformance.mark( 'mwLoadStart' );
/**
* See <https://www.mediawiki.org/wiki/Compatibility#Browsers>
*
* Capabilities required for modern run-time:
* - DOM Level 4 & Selectors API Level 1
* - HTML5 & Web Storage
* - DOM Level 2 Events
*
* Browsers we support in our modern run-time (Grade A):
* - Chrome
* - IE 9+
* - Firefox 3.5+
* - Safari 4+
* - Opera 10.5+
* - Mobile Safari (iOS 1+)
* - Android 2.0+
*
* Browsers we support in our no-javascript run-time (Grade C):
* - IE 6+
* - Firefox 3+
* - Safari 3+
* - Opera 10+
* - WebOS < 1.5
* - PlayStation
* - Symbian-based browsers
* - NetFront-based browser
* - Opera Mini
* - Nokia's Ovi Browser
* - MeeGo's browser
* - Google Glass
*
* Other browsers that pass the check are considered Grade X.
*/
function isCompatible( str ) {
var ua = str || navigator.userAgent;
return !!(
// http://caniuse.com/#feat=queryselector
'querySelector' in document
// http://caniuse.com/#feat=namevalue-storage
// https://developer.blackberry.com/html5/apis/v1_0/localstorage.html
// https://blog.whatwg.org/this-week-in-html-5-episode-30
&& 'localStorage' in window
// http://caniuse.com/#feat=addeventlistener
&& 'addEventListener' in window
// Hardcoded exceptions for browsers that pass the requirement but we don't want to
// support in the modern run-time.
&& !(
ua.match( /webOS\/1\.[0-4]/ ) ||
ua.match( /PlayStation/i ) ||
ua.match( /SymbianOS|Series60|NetFront|Opera Mini|S40OviBrowser|MeeGo/ ) ||
( ua.match( /Glass/ ) && ua.match( /Android/ ) )
)
);
}
// Conditional script injection
( function () {
var NORLQ, script;
if ( !isCompatible() ) {
// Undo class swapping in case of an unsupported browser.
// See OutputPage::getHeadScripts().
document.documentElement.className = document.documentElement.className
.replace( /(^|\s)client-js(\s|$)/, '$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.
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 () {}
};
}
script = document.createElement( 'script' );
script.src = $VARS.baseModulesUri;
script.onload = script.onreadystatechange = function () {
if ( !script.readyState || /loaded|complete/.test( script.readyState ) ) {
// Clean up
script.onload = script.onreadystatechange = null;
script = null;
// Callback
startUp();
}
};
document.getElementsByTagName( 'head' )[ 0 ].appendChild( script );
}() );