phpjs/functions/math/pow.js

php.js offers community built php functions in javascript

function pow(base, exp) {
  //  discuss at: http://phpjs.org/functions/pow/
  // original by: Onno Marsman
  //   example 1: pow(8723321.4, 7);
  //   returns 1: 3.8439091680778995e+48

  return Math.pow(base, exp);
}