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.

A lightning-fast crash course on JavaScript, the world’s most popular programming language. From its 1995 origins as Mocha in ...

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 remained in ...