Current File : //www/varak.net/wiki.varak.net/resources/src/startup/startup.js
/**
* 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!
*/
/* eslint-disable no-implicit-globals, vars-on-top, no-unmodified-loop-condition */
/* global $VARS, $CODE */
/**
* See <https://www.mediawiki.org/wiki/Compatibility#Browsers>
*
* Capabilities required for modern run-time:
* - ECMAScript 5
* - DOM Level 4 & Selectors API Level 1
* - HTML5 & Web Storage
* - DOM Level 2 Events
*
* Browsers we support in our modern run-time (Grade A):
* - Chrome 13+
* - IE 11+
* - Firefox 4+
* - Safari 5+
* - Opera 15+
* - Mobile Safari 6.0+ (iOS 6+)
* - Android 4.1+
*
* Browsers we support in our no-javascript run-time (Grade C):
* - Chrome 1+
* - IE 6+
* - Firefox 3+
* - Safari 3+
* - Opera 15+
* - Mobile Safari 5.0+ (iOS 4+)
* - Android 2.0+
* - WebOS < 1.5
* - PlayStation
* - Symbian-based browsers
* - NetFront-based browser
* - Opera Mini
* - Nokia's Ovi Browser
* - MeeGo's browser
* - Google Glass
* - UC Mini (speed mode on)
*
* Other browsers that pass the check are considered Grade X.
*
* @param {string} [str] User agent, defaults to navigator.userAgent
* @return {boolean} User agent is compatible with MediaWiki JS
*/
function isCompatible( str ) {
var ua = str || navigator.userAgent;
return !!(
// https://caniuse.com/#feat=es5
// https://caniuse.com/#feat=use-strict
// https://caniuse.com/#feat=json / https://phabricator.wikimedia.org/T141344#2784065
( function () {
'use strict';
return !this && Function.prototype.bind && window.JSON;
}() ) &&
// https://caniuse.com/#feat=queryselector
'querySelector' in document &&
// https://caniuse.com/#feat=namevalue-storage
// https://developer.blackberry.com/html5/apis/v1_0/localstorage.html
// https://blog.whatwg.org/this-week-in-html-5-episode-30
'localStorage' in window &&
// https://caniuse.com/#feat=addeventlistener
'addEventListener' in window &&
// Hardcoded exceptions for browsers that pass the requirement but we don't want to
// support in the modern run-time.
// Note: Please extend the regex instead of adding new ones
!ua.match( /MSIE 10|webOS\/1\.[0-4]|SymbianOS|Series60|NetFront|Opera Mini|S40OviBrowser|MeeGo|Android.+Glass|^Mozilla\/5\.0 .+ Gecko\/$|googleweblight|PLAYSTATION|PlayStation/ )
);
}
if ( !isCompatible() ) {
// Handle Grade C
// Undo speculative Grade A <html> class. See ResourceLoaderClientHtml::getDocumentAttributes().
document.documentElement.className = document.documentElement.className
.replace( /(^|\s)client-js(\s|$)/, '$1client-nojs$2' );
// Process any callbacks for Grade C
while ( window.NORLQ && window.NORLQ[ 0 ] ) {
window.NORLQ.shift()();
}
window.NORLQ = {
push: function ( fn ) {
fn();
}
};
// Clear and disable the Grade A queue
window.RLQ = {
push: function () {}
};
} else {
// Handle Grade A
if ( window.performance && performance.mark ) {
performance.mark( 'mwStartup' );
}
// This embeds mediawiki.js, which defines 'mw' and 'mw.loader'.
$CODE.defineLoader();
/**
* The $CODE and $VARS placeholders are substituted in ResourceLoaderStartUpModule.php.
*/
( function () {
/* global mw */
mw.config = new mw.Map( $VARS.wgLegacyJavaScriptGlobals );
$CODE.registrations();
mw.config.set( $VARS.configuration );
// Process callbacks for Grade A
var queue = window.RLQ;
// Replace RLQ placeholder from ResourceLoaderClientHtml with an implementation
// that executes simple callbacks, but continues to store callbacks that require
// modules.
window.RLQ = [];
/* global RLQ */
RLQ.push = function ( fn ) {
if ( typeof fn === 'function' ) {
fn();
} else {
// This callback requires a module, handled in mediawiki.base.
RLQ[ RLQ.length ] = fn;
}
};
while ( queue && queue[ 0 ] ) {
// Re-use our new push() method
RLQ.push( queue.shift() );
}
// Clear and disable the Grade C queue
window.NORLQ = {
push: function () {}
};
}() );
}
Mini Shell