phpjs/functions/pcre/preg_quote.js

php.js offers community built php functions in javascript

function preg_quote(str, delimiter) {
  //  discuss at: http://phpjs.org/functions/preg_quote/
  // original by: booeyOH
  // improved by: Ates Goral (http://magnetiq.com)
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: Brett Zamir (http://brett-zamir.me)
  // bugfixed by: Onno Marsman
  //   example 1: preg_quote("$40");
  //   returns 1: '\\$40'
  //   example 2: preg_quote("*RRRING* Hello?");
  //   returns 2: '\\*RRRING\\* Hello\\?'
  //   example 3: preg_quote("\\.+*?[^]$(){}=!<>|:");
  //   returns 3: '\\\\\\.\\+\\*\\?\\[\\^\\]\\$\\(\\)\\{\\}\\=\\!\\<\\>\\|\\:'

  return String(str)
    .replace(new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\' + (delimiter || '') + '-]', 'g'), '\\$&');
}