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La méthode Promise.reject (raison) renvoie un objet Promise qui est rejeté (la promesse n'est pas tenue) à cause d'une raison donnée.
Promise.reject() is essentially a shorthand for new Promise((resolve, reject) => reject(reason)). Unlike Promise.resolve(), Promise.reject() always wraps reason in a new Promise object, even when reason is already a Promise.
https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Global_Objects › Promise
Promise - JavaScript | MDN - MDN Web DocsLa fonction tetheredGetNumber() illustre un générateur de promesse qui utilise reject() lors d'un appel asynchrone ou dans la fonction de rappel (ou dans les deux). La fonction promiseGetWord() illustre comment une fonction d'API peut générer et renvoyer une promesse de façon autonome.
https://www.freecodecamp.org › news › javascript-promise-tutorial-how-to-resolve-or-reject...
JavaScript Promise Tutorial – How to Resolve or Reject Promises in JSThe Promise.resolve/reject methods. Promise.resolve(value) – It resolves a promise with the value passed to it. It is the same as the following: let promise = new Promise (resolve => resolve(value)); Promise.reject(error) – It rejects a promise with the error passed to it. It is the same as the following:
https://www.w3schools.com › jsref › jsref_promise_reject.asp
JavaScript Promise.reject() Method - W3SchoolsDescription. The Promise.reject() method returns a Promise object rejected with a value. Syntax. Promise.reject (message) Parameters. Return Value. Promise Tutorial. catch () finally () then () Browser Support. Promise.Reject() is an ECMAScript6 (ES6) feature. ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:
https://stackoverflow.com › questions › 33445415
JavaScript Promises - reject vs. throw - Stack OverflowAny time you are inside of a promise callback, you can use throw. However, if you're in any other asynchronous callback, you must use reject. For example, this won't trigger the catch: new Promise(function() {. setTimeout(function() {. throw 'or nah'; // return Promise.reject('or nah'); also won't work. }, 1000);
https://masteringjs.io › tutorials › fundamentals › promise-reject
Reject a Promise in JavaScript - Mastering JSThe Promise.reject() function is the most concise way to create a rejected promise that contains a given error. You should then use .catch() to handle the error. const p = Promise.reject(new Error('Oops!')); return p.catch(err => { err.message; // 'Oops!' }); With the Promise Constructor.
https://stackoverflow.com › questions › 30233302
javascript - Promise - is it possible to force cancel a promise - Stack ...Promises have settled (hah) and it appears like it will never be possible to cancel a (pending) promise. Instead, there is a cross-platform (Node, Browsers etc) cancellation primitive as part of WHATWG (a standards body that also builds HTML) called AbortController.
https://www.freecodecamp.org › news › javascript-es6-promises-for-beginners-resolve-reject...
JavaScript Promise Tutorial: Resolve, Reject, and Chaining in JS and ES6When we define a promise in JavaScript, it will be resolved when the time comes, or it will get rejected. Promises in JavaScript. First of all, a Promise is an object. There are 3 states of the Promise object: Pending: Initial State, before the Promise succeeds or fails. Resolved: Completed Promise. Rejected: Failed Promise.
https://javascript.info › promise-basics
Promise - The Modern JavaScript Tutoriallet promise = new Promise (function (resolve, reject) { // executor (the producing code, "singer") }); The function passed to new Promise is called the executor. When new Promise is created, the executor runs automatically. It contains the producing code which should eventually produce the result.
