At the heart of JavaScript’s asynchronous connection-handling are “promises,” which provide a new way of scheduling how your code will work with JavaScript APIs and functions.

In a twist of irony, a cancelable promises capability has been cancelled as a planned addition to JavaScript itself. The proposal had been championed by Google’s Dominic Denicola but had ...

Even more interesting for developers, however, is likely the upcoming addition of JavaScript Promises to IE. By default, JavaScript is single-threaded, so you can only run one script at a time.

An update to tiny "is-promise" library impacted millions of JavaScript projects.