programming tasks have been executed sequentially or line by line, which can lead to delays or "blocking" when long-running tasks are encountered. Asynchronous programming in JavaScript leverages ...

However, JavaScript developers had been implementing ... and see how we can use each technique to coordinate multiple layers of execution. Asynchronous functions that use callbacks take a function ...

Developers use JavaScript promises to model asynchronous operations in web ... This approach gets us as close to parallel execution as we can get with JavaScript. You can also use finally ...