JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/q.js/1.0.1/q.js"></script>

JavaScript

var d = Q.defer();
d.promise
.then(function(){return 1;}, function(){return 2;})
.then(function(){alert('win');}, function(){alert('fail');});
d.reject();