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 for ...

Asynchronous code (async code) says: go do something while I do other things, then let me know what happened when the results are ready. Also known as concurrency, async is important in a variety of ...

You’re not imagining things: Some JavaScript web apps are quite slow, owing to egregiously high startup, parsing, and data transfer overhead. According to ...