( function ( mw ) { /** * @class mw.RegExp */ mw.RegExp = { /** * Escape string for safe inclusion in regular expression * * The following characters are escaped: * * \ { } ( ) | . ? * + - ^ $ [ ] * * @since 1.26 * @static * @param {string} str String to escape * @return {string} Escaped string */ escape: function ( str ) { return str.replace( /([\\{}()|.?*+\-\^$\[\]])/g, '\\$1' ); } }; }( mediaWiki ) );