Callbacks were the only natively supported way to deal with async code in JavaScript until 2016 ... Asynchronous functions that use callbacks take a function as a parameter, which will be called ...

When writing synchronous JavaScript ... function or some nested function, or as a closed over variable), or implicitly (extracted from the call stack, e.g., outside the scope as a external object that ...

A few months before its expected approval, ECMAScript 2017, the latest official specification underlying JavaScript, has been fleshed out with async functions and shared memory capabilities.

The compiler stratifies input JavaScript code into two levels ... may be either explicit or implicit in syntax (two-level or single-level syntax resp.). Async functions or generators syntax can be ...

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. Promises are a central mechanism ...