A simple, if ugly, approach to promise chaining

processchaining.js

var things = [
  //...Array of things to process...
  ];

var methodThatReturnsPromise() = function {
  // Must be executed on all the things
  // In order
  
  // return a promise
};

var i = 0;

var whenDone = function () {
    //We're done now, move on...
};

var proccessThing = function (thing) {
    return methodThatReturnsPromise(thing).then(function () {
        i++;
        if (i < thing.length) {
            proccessThing(things[i]);
        } else {
            whenDone();
        }
    });
};

proccessThing(things[0]);