phpjs/functions/strings/addslashes.js

php.js offers community built php functions in javascript

function addslashes(str) {
  //  discuss at: http://phpjs.org/functions/addslashes/
  // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: Ates Goral (http://magnetiq.com)
  // improved by: marrtins
  // improved by: Nate
  // improved by: Onno Marsman
  // improved by: Brett Zamir (http://brett-zamir.me)
  // improved by: Oskar Larsson Högfeldt (http://oskar-lh.name/)
  //    input by: Denny Wardhana
  //   example 1: addslashes("kevin's birthday");
  //   returns 1: "kevin\\'s birthday"

  return (str + '')
    .replace(/[\\"']/g, '\\$&')
    .replace(/\u0000/g, '\\0');
}