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      • In JavaScript, a promise is a placeholder (proxy) for the value of an ongoing operation. You typically use a promise to manage situations where you must wait for the outcome of an operation. For example, uploading files to the server and awaiting the response of an API call, or just asking the user to choose a file from their computer.

      JavaScript Promises for Beginners - freeCodeCamp.org

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  3. developer.mozilla.org › Guide › Using_promisesUsing promises - JavaScript | MDN - MDN Web Docs

    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.

  4. www.freecodecamp.org › news › the-javascriptHow JavaScript Promises Work – Handbook for Beginners

    Feb 13, 2024 · How JavaScript Promises Work – Handbook for Beginners. Many operations, such as network requests, are asynchronous in nature. One of the most useful and powerful tools for working with asynchronous code is the Promise. In this handbook, you'll learn all about JavaScript Promises and how to use them.

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  6. www.w3schools.com › Js › js_promiseJavaScript Promises - W3Schools

    Here is how to use a Promise: myPromise.then(. function(value) { /* code if successful */ }, function(error) { /* code if some error */ } ); Promise.then () takes two arguments, a callback for success and another for failure. Both are optional, so you can add a callback for success or failure only.

  7. www.aleksandrhovhannisyan.com › blog › javascriptJavaScript Promises: Practical Use Cases and Examples

    Sep 12, 2020 · Promises offer a powerful and legible syntax for writing asynchronous code in JavaScript. This post assumes a basic understanding of Promises and how they work. We’ll look at three practical use cases of Promises in JavaScript to get you comfortable with using them. Skip table of contents.

  8. developer.mozilla.org › en-US › docsPromise - JavaScript | MDN - MDN Web Docs

    Oct 7, 2024 · The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value. To learn about the way promises work and how you can use them, we advise you to read Using promises first.

  9. www.freecodecamp.org › news › javascript-promiseHow JavaScript Promises Work – Tutorial for Beginners

    Nov 29, 2023 · When to Use Promises Instead of Callbacks. Promises and the Fetch API. The Promise.all() Method. The Promise.allSettled() Method. The Promise.any() Method. The Promise.race() Method. Conclusion. How a Promise Works.

  10. medium.com › @AlexanderObregon › understandingJavaScript Promises Explained - Medium

    Jun 20, 2024 · Introduction. JavaScript Promises are an important part of modern JavaScript, enabling developers to handle asynchronous operations more effectively. This article will explore how Promises...

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