OAuth 1.0 nonce.

nonce.js

module.exports = function() {
  const NONCE_CHARS = [
    'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r',
    's','t','u','v','w','x','y','z','A','B','C','D','E','F','G','H','I','J',
    'K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','0','1',
    '2','3','4','5','6','7','8','9'
  ];

  const NONCE_SIZE = 32;

  return function() {

    var result = [], position;

    for (var i = 0; i < NONCE_SIZE; i++) {
      position = Math.floor(Math.random() * NONCE_CHARS.length);
      result[i] =  NONCE_CHARS[position];
    }

    return result.join('');
  };
};

var nonce = require('./nonce)();

console.log(nonce());