phpjs/functions/math/hypot.js

php.js offers community built php functions in javascript

function hypot(x, y) {
  //  discuss at: http://phpjs.org/functions/hypot/
  // original by: Onno Marsman
  //   example 1: hypot(3, 4);
  //   returns 1: 5
  //   example 2: hypot([], 'a');
  //   returns 2: 0

  return Math.sqrt(x * x + y * y) || 0;
}