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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 ...

JavaScript is the second-largest contributor to page weight, behind images, which means it can play a major role in slowing down the speed of your mobile site. Here's how you can reduce your reliance ...