MediaWiki:Common.js

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/*
 * This is the JS for all skins (for both mobile and desktop) on MediaWiki.org.
 * Consider whether you can use a gadget with one of the options set to limit
 * where it is loaded. See [[Extension:Gadgets#Options]].
 */
/* global mw, $ */
/**
 * Hide prefix in category
 *
 * @source https://www.mediawiki.org/wiki/Snippets/Hide_prefix_in_category
 * @rev 5
 */
var prefix = $.trim( $( '#mw-cat-hideprefix' ).text() ) || ( mw.config.get( 'wgTitle' ) + '/' );
$( '#mw-pages' ).find( 'a' ).text( function ( i, val ) {
    return val.slice( 0, prefix.length ) === prefix ? val.slice( prefix.length ) : val;
} );

/**
 * @source https://www.mediawiki.org/wiki/Snippets/Load_JS_and_CSS_by_URL
 * @revision 2017-05-16
 */
mw.loader.using( ['mediawiki.util'], function () {
	var extraCSS = mw.util.getParamValue( 'withCSS' ),
		extraJS = mw.util.getParamValue( 'withJS' ),
		extraModule = mw.util.getParamValue( 'withModule' );

	if ( extraCSS ) {
		// WARNING: DO NOT REMOVE THIS "IF" - REQUIRED FOR SECURITY (against XSS/CSRF attacks)
		if ( /^MediaWiki:[^&<>=%#]*\.css$/.test( extraCSS ) ) {
			mw.loader.load( '/w/index.php?title=' + encodeURIComponent( extraCSS ) + '&action=raw&ctype=text/css', 'text/css' );
		} else {
			mw.notify( 'Only pages from the MediaWiki namespace are allowed.', { title: 'Invalid withCSS value' } );
		}
	}

	if ( extraJS ) {
		// WARNING: DO NOT REMOVE THIS "IF" - REQUIRED FOR SECURITY (against XSS/CSRF attacks)
		if ( /^MediaWiki:[^&<>=%#]*\.js$/.test( extraJS ) ) {
			mw.loader.load( '/w/index.php?title=' + encodeURIComponent( extraJS ) + '&action=raw&ctype=text/javascript' );
		} else {
			mw.notify( 'Only pages from the MediaWiki namespace are allowed.', { title: 'Invalid withJS value' } );
		}
	}

	if ( extraModule ) {
		if ( /^ext\.gadget\.[^,\|]+$/.test( extraModule ) ) {
			mw.loader.load( extraModule );
		} else {
			mw.notify( 'Only gadget modules are allowed.', { title: 'Invalid withModule value' } );
		}
	}
});