JavaScript Promises Guide
Promises represent asynchronous operations in JavaScript. They provide a cleaner alternative to callbacks for handling async code. The guide walks through Creating Promises, Consuming Promises, Combining Promises, Async/Await. Use `new Promise(executor)` where executor receives `resolve` and `reject` functions. `Promise.resolve()` creates a resolved promise, `Promise.reject()` creates a rejected one. `.then()` handles fulfillment, `.catch()` handles rejection, `.finally()` runs regardless of outcome. Each `.then()` returns a new promise, enabling chaining. The guide is organized into 4 sections that build on each other, each pairing a prose explanation with runnable code. Browse the individual methods covered by this guide in the Promises category. Key APIs covered include Promise.prototype.then(), Promise.prototype.catch(), Promise.prototype.finally(), Promise.resolve(), Promise.reject(), Promise.all(). Related guides: Arrays, Strings, Numbers, Math, Date. This is one of 145 JavaScript guides on JS Reference — see the full list on the guides page. Practice what you learn in the JavaScript playground, and look up any unfamiliar term in the JavaScript glossary.