Nowadays JavaScript has three different keywords to declare a variable — var, let and, const. Each has its own properties and particularities. Let’s start by making a simple comparison table ...

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.

Possibly the most common use case in all of JavaScript for async and await is using the browser’s built-in fetch API. Listing 1 declares an async function and uses await within it.