Generate a random 32 bit unsigned integer

RandomUint32.js

function randomUint32() {
  if (window && window.crypto && window.crypto.getRandomValues && Uint32Array) {
      var o = new Uint32Array(1);
      window.crypto.getRandomValues(o);
      return o[0];
  } else {
      console.warn('Falling back to pseudo-random client seed');
      return Math.floor(Math.random() * Math.pow(2, 32));
  }
}

Some one-liners:

// crypto
window.crypto.getRandomValues(new Uint32Array(1))[0];
// Math.random
(Math.random()*4294967296)>>>0;