Ars Technica

JS: premature method return due to asynchronous function call

var a, async = function(f) { setTimeout(function() { var r = 'step 2'; f(r); }, 1); }, myFunc = function() { a = 'step 1'; async(function(r) { a = r; // should reset ...
InfoWorld

5 ways to use JavaScript promises

Developers use JavaScript promises to model asynchronous operations in web and server-side programs. Here's a quick look at five ways to use promises in your code ...