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/**
* This script provides a function which is run to evaluate whether or not to
* continue loading jQuery and the MediaWiki modules. This code should work on
* even the most ancient of browsers, so be very careful when editing.
*/
/*jshint unused: false, evil: true */
/*globals mw, RLQ: true, $VARS, $CODE, performance */
var mediaWikiLoadStart = ( new Date() ).getTime(),
mwPerformance = ( window.performance && performance.mark ) ? performance : {
mark: function () {}
};
mwPerformance.mark( 'mwLoadStart' );
/**
* Returns false for Grade C supported browsers.
*
* This function should only be used by the Startup module, do not expand it to
* be generally useful beyond startup.
*
* See also:
* - https://www.mediawiki.org/wiki/Compatibility#Browsers
* - https://jquery.com/browser-support/
*/
function isCompatible( ua ) {
if ( ua === undefined ) {
ua = navigator.userAgent;
}
// Browsers with outdated or limited JavaScript engines get the no-JS experience
return !(
// Internet Explorer < 8
( ua.indexOf( 'MSIE' ) !== -1 && parseFloat( ua.split( 'MSIE' )[ 1 ] ) < 8 ) ||
// Firefox < 3
( ua.indexOf( 'Firefox/' ) !== -1 && parseFloat( ua.split( 'Firefox/' )[ 1 ] ) < 3 ) ||
// Opera < 12
( ua.indexOf( 'Opera/' ) !== -1 && ( ua.indexOf( 'Version/' ) === -1 ?
// "Opera/x.y"
parseFloat( ua.split( 'Opera/' )[ 1 ] ) < 10 :
// "Opera/9.80 ... Version/x.y"
parseFloat( ua.split( 'Version/' )[ 1 ] ) < 12
) ) ||
// "Mozilla/0.0 ... Opera x.y"
( ua.indexOf( 'Opera ' ) !== -1 && parseFloat( ua.split( ' Opera ' )[ 1 ] ) < 10 ) ||
// BlackBerry < 6
ua.match( /BlackBerry[^\/]*\/[1-5]\./ ) ||
// Open WebOS < 1.5
ua.match( /webOS\/1\.[0-4]/ ) ||
// Anything PlayStation based.
ua.match( /PlayStation/i ) ||
// Any Symbian based browsers
ua.match( /SymbianOS|Series60/ ) ||
// Any NetFront based browser
ua.match( /NetFront/ ) ||
// Opera Mini, all versions
ua.match( /Opera Mini/ ) ||
// Nokia's Ovi Browser
ua.match( /S40OviBrowser/ ) ||
// MeeGo's browser
ua.match( /MeeGo/ ) ||
// Google Glass browser groks JS but UI is too limited
( ua.match( /Glass/ ) && ua.match( /Android/ ) )
);
}
// Conditional script injection
( function () {
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' );
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.
window.RLQ = window.RLQ || [];
while ( RLQ.length ) {
RLQ.shift()();
}
window.RLQ = {
push: function ( fn ) {
fn();
}
};
}
var 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 );
}() );
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