Promises, handlers, and chains are foundations of modern JavaScript, but they can be tricky. Here are four common traps to ...

Callbacks were the only natively supported way to deal with async code in JavaScript until 2016, when the Promise object was introduced to the language. However, JavaScript developers had been ...

but typically JavaScript is in the same queue as painting, updating styles, and handling user actions (such as highlighting text and interacting with form controls). Activity in one of these things ...