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1. www.learn-js.org › en › PromisesPromises - Learn JavaScript - Free Interactive JavaScript ...

   www.learn-js.org › en › Promises

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   A Promise is a native JavaScript object which has two traits: 1. It receives a single argument which is a function. This function needs to have two arguments, a resolve function and a reject function.

2. Videos

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     JavaScript Promises In 10 Minutes

     17 Jan 2019

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     How To Create Your Own Implementation Of JavaScript Promises

     3 May 2022

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     1:36:23

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     Asynchronous JavaScript Course (Async/Await, Promises, Callbacks)

     22 Jun 2021

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3. www.classcentral.com › course › freecodecampFree Video: Asynchronous JavaScript - Promises, Async/Await ...

   www.classcentral.com › course › freecodecamp

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   Master asynchronous JavaScript with hands-on projects. Learn promises, async/await, and Fetch API to build efficient, non-blocking applications. Practical examples include working with Chuck Norris, Weather, and Pokedex APIs.

4. learnjavascript.online › topics › promisesPromises tutorial - Learn JavaScript

   learnjavascript.online › topics › promises

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   Apr 9, 2024 · Web APIs and promises. Many web APIs, such as the Fetch API, use promises. This means that you can use the .then() and .catch() methods to handle the eventual success or failure of the API call. Chaining promises. If you've ever worked with the fetch() API, you've probably seen code like this:

5. medium.com › @armando_amador › how-to-make-httpUsing Fetch API and Promises - Medium

   medium.com › @armando_amador › how-to-make-http

   You will learn how to make a HTTP request using Fetch API, learn the basics of a native JavaScript Promise object and how to chain Promises using the Promise.prototype.then() method.

6. www.crocoder.dev › blog › promises-exercisesPromises - Code Exercises | CroCoder

   www.crocoder.dev › blog › promises-exercises

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   Jan 18, 2024 · Explore JavaScript Promises with exercises on random resolution, chained arithmetic, parallel data fetching, fastest response, and cancellation. Improve your async skills with concise code and clear explanations. Learn effective methods for handling promises, simplifying errors, and creating resilient, maintainable code.

7. www.freecodecamp.org › news › javascript-promisesJavaScript Promises for Beginners - freeCodeCamp.org

   www.freecodecamp.org › news › javascript-promises

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   May 25, 2022 · 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.

8. People also ask

   What are examples of JavaScript promises?

   • 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. You will learn about JavaScript promises in this article by building a real-world example app like the one below:

   JavaScript Promises for Beginners - freeCodeCamp.org

   www.freecodecamp.org/news/javascript-promises-for-beginners/

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   What is a promise function in JavaScript?

   • Notice that we used the then function here, which is one of the methods of a Promise. A Promise is a native JavaScript object which has two traits: 1. It receives a single argument which is a function. This function needs to have two arguments, a resolve function and a reject function.

   Promises - Learn JavaScript - Free Interactive JavaScript Tutorial

   www.learn-js.org/en/Promises

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   What is a promise in Java?

   • A promise is an object that represents the eventual completion or failure of an asynchronous operation. You create that object with the new Promise () constructor. A promise lets us handle the eventual success or failure of an asynchronous operation with the .then () and .catch () callback methods respectively.

   Promises tutorial - Learn JavaScript

   learnjavascript.online/topics/promises.html

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   How do you return a promise in JavaScript?

   • Write a function which receives a string, and returns a Promise. The promise should resolve with the uppercase version of the string, but should reject if the string is null. learn-js.org is a free interactive JavaScript tutorial for people who want to learn JavaScript, fast.

   Promises - Learn JavaScript - Free Interactive JavaScript Tutorial

   www.learn-js.org/en/Promises

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   How to chain promises together in JavaScript?

   • The first promise is returned by the fetch () function. The second promise is returned by the response.json () method. The .then () method is called on the first promise, and it returns a new promise. This new promise is returned by the callback function that you pass to .then (). This is how you can chain promises together.

   Promises tutorial - Learn JavaScript

   learnjavascript.online/topics/promises.html

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   How does a promise work?

   • Instead of juggling multiple callbacks, which can quickly become unwieldy and hard to follow, promises allow developers to chain operations in a linear and readable manner. This is done through .then() for successful operations, and .catch() for handling errors.

   Promises - Code Exercises | CroCoder

   www.crocoder.dev/blog/promises-exercises/

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9. www.classcentral.com › course › udacity-javascriptFree Course: JavaScript Promises from Google | Class Central

   www.classcentral.com › course › udacity-javascript

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   Learn how to handle asynchronous work with ease! In this course, you'll use Native JavaScript Promises to write asynchronous code that is easy to read, easy to write and easy to debug. Along the way, you'll be using Promises to make a webapp come to life!