Add .done to native ES6 Promises

gistfile1.js

/* Native HTML5 promises will swallow exceptions if you're not careful. For example:
 *
 *   promise.then(function() {
 *     something.froEach(iterator);
 *   });
 *
 * This extension patches the Promise prototype with a `done` method that will log errors:
 *
 *   promise.then(function() {
 *     something.froEach(iterator);
 *   }).done();
 */

define(function() {
  if (window.Promise.prototype.done) {
    console.warn("WARNING: not monkey-patching Promise.done as it already exists");
  } else {
    window.Promise.prototype.done = function() {
      this.then(null, function(e) {
        console.error(e.stack);
      });
    };
  }
});