phpjs/functions/math/dechex.js

php.js offers community built php functions in javascript

function dechex(number) {
  //  discuss at: http://phpjs.org/functions/dechex/
  // original by: Philippe Baumann
  // bugfixed by: Onno Marsman
  // improved by: http://stackoverflow.com/questions/57803/how-to-convert-decimal-to-hex-in-javascript
  //    input by: pilus
  //   example 1: dechex(10);
  //   returns 1: 'a'
  //   example 2: dechex(47);
  //   returns 2: '2f'
  //   example 3: dechex(-1415723993);
  //   returns 3: 'ab9dc427'

  if (number < 0) {
    number = 0xFFFFFFFF + number + 1;
  }
  return parseInt(number, 10)
    .toString(16);
}