Adding a .finally() method would be nice (src included)

Although not included in ES6. The finally() method is very valuable.

Here’s one implementation:

Promise.prototype.finally = function(callback) {
  var p = this.constructor;
  // We don’t invoke the callback in here,
  // because we want then() to handle its exceptions
  return this.then(
    // Callback fulfills: pass on predecessor settlement
    // Callback rejects: pass on rejection (=omit 2nd arg.)
    function(value) {
      p.resolve(callback()).then(function() { return value; });
    },
    function(reason) {
      p.resolve(callback()).then(function() { throw reason; });
    }
  );
}

• http://www.2ality.com/2014/10/es6-promises-api.html

[calvinmetcalf]

yeah it’s stage 3 so I guess I can put it in

[tohagan]

Thanks