Yahoo Web Search

Search results

1. developer.mozilla.org › en-US › docsUsing promises - JavaScript | MDN - MDN Web Docs

   developer.mozilla.org › en-US › docs

   • Cached

   Oct 7, 2024 · A Promise is an object representing the eventual completion or failure of an asynchronous operation. Since most people are consumers of already-created promises, this guide will explain consumption of returned promises before explaining how to create them.

2. Videos

   • 

     11:31

     youtube.com

     JavaScript Promises In 10 Minutes

     17 Jan 2019

     1.8M views

   • 

     37:05

     youtube.com

     JavaScript Promises -- Tutorial for Beginners

     4 Oct 2022

     126.6K views

   • 

     14:54

     youtube.com

     JavaScript Promises for Complete Beginners

     26 Jan 2021

     66.6K views

   View all

3. javascript.info › promise-basicsPromise - The Modern JavaScript Tutorial

   javascript.info › promise-basics

   • Cached

   Jun 23, 2024 · A promise is a special JavaScript object that links the “producing code” and the “consuming code” together. In terms of our analogy: this is the “subscription list”. The “producing code” takes whatever time it needs to produce the promised result, and the “promise” makes that result available to all of the subscribed code when it’s ready.

4. www.freecodecamp.org › news › javascript-promisesHow to Use JavaScript Promises – Callbacks, Async/Await, and ...

   www.freecodecamp.org › news › javascript-promises

   • Cached

   Aug 15, 2023 · In this tutorial, you will learn everything you need to know about using promises and async/await in JavaScript. So let's get started. If you'd like to learn along with a video version of this tutorial, you can also check out my YouTube playlist.

5. home.cs.colorado.edu › ~kena › classesAsynchronous Programming in Javascript, Part 2

   home.cs.colorado.edu › ~kena › classes

   • promises are objects that represent the result of an async computation • once a promise is settled, it stays settled, and remembers its result • you can call a promise’s then() method more than once and it will

   • File Size: 547KB

   • Page Count: 34

6. pepa.holla.cz › 08 › JavaScript-with-PromisesLearn how Promises organize callbacks into discrete steps ...

   pepa.holla.cz › 08 › JavaScript-with-Promises

   JavaScript with Promises. Asynchronous JavaScript is everywhere, whether you’re using Ajax, AngularJS, Node.js, or WebRTC. This practical guide shows intermediate to advanced JavaScript developers how Promises can help you manage asynchronous code effectively—including the inevitable flood of callbacks as your codebase grows.

7. medium.com › insiderengineering › masteringMastering JavaScript Promises: From Basics to Advanced

   medium.com › insiderengineering › mastering

   Oct 9, 2023 · A Promise is a JavaScript object used for managing asynchronous operations. Promises allow you to write code that continues after a specific event occurs without blocking the execution of...

8. People also ask

   What is a JavaScript promise?

   • The “producing code” takes whatever time it needs to produce the promised result, and the “promise” makes that result available to all of the subscribed code when it’s ready. The analogy isn’t terribly accurate, because JavaScript promises are more complex than a simple subscription list: they have additional features and limitations.

   Promise - The Modern JavaScript Tutorial

   javascript.info/promise-basics

   See all results for this question

   What is a promise in Java?

   • A promise is a method that eventually produces a value. It can be considered as the asynchronous counterpart of a getter function. Its essence can be explained as: // Do something with the 'value' Promises can replace the asynchronous use of callbacks, and they provide several benefits over them.

   JavaScript Promises: A Tutorial With Examples - Toptal

   www.toptal.com/javascript/javascript-promises

   See all results for this question

   What is the difference between a fan and a promise in JavaScript?

   • That’s a “singer”. A “consuming code” that wants the result of the “producing code” once it’s ready. Many functions may need that result. These are the “fans”. A promise is a special JavaScript object that links the “producing code” and the “consuming code” together. In terms of our analogy: this is the “subscription list”.

   Promise - The Modern JavaScript Tutorial

   javascript.info/promise-basics

   See all results for this question

   How to create a promise-based alternative?

   • Create a promise-based alternative. The function delay(ms) should return a promise. That promise should resolve after ms milliseconds, so that we can add .then to it, like this: Rewrite the showCircle function in the solution of the task Animated circle with callback so that it returns a promise instead of accepting a callback. The new usage:

   Promise - The Modern JavaScript Tutorial

   javascript.info/promise-basics

   See all results for this question

   What is a second promise in JavaScript?

   • Here's the magic: the then() function returns a new promise, different from the original: This second promise (promise2) represents the completion not just of doSomething(), but also of the successCallback or failureCallback you passed in — which can be other asynchronous functions returning a promise.

   Using promises - JavaScript | MDN - MDN Web Docs

   developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises

   See all results for this question

   What is a promise object?

   • A Promise object serves as a link between the executor (the “producing code” or “singer”) and the consuming functions (the “fans”), which will receive the result or error. Consuming functions can be registered (subscribed) using the methods .then and .catch. The most important, fundamental one is .then. The syntax is:

   Promise - The Modern JavaScript Tutorial

   javascript.info/promise-basics

   See all results for this question

9. www.toptal.com › javascript › javascript-promisesJavaScript Promises: A Tutorial With Examples - Toptal

   www.toptal.com › javascript › javascript-promises

   • Cached

   What is a JavaScript promise? A promise is a method that eventually produces a value. It can be considered as the asynchronous counterpart of a getter function. Its essence can be explained as: promise.then(function(value) { // Do something with the 'value' });