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://www.w3schools.com › jsref › jsref_promise_reject.asp
JavaScript Promise.reject() Method - W3SchoolsThe 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://developer.mozilla.org › fr › docs › Web › JavaScript › Guide › Using_promises
Utiliser les promesses - JavaScript | MDN - MDN Web DocsPromise.resolve() et Promise.reject() sont des méthodes qui permettent de créer des promesses déjà tenues ou rompues. Promise.all() et Promise.race() sont deux outils de composition qui permettent de mener des opérations asynchrones en parallèle.
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://javascript.info › promise-basics
Promise - The Modern JavaScript Tutorialreject (error) — if an error has occurred, error is the error object. So to summarize: the executor runs automatically and attempts to perform a job. When it is finished with the attempt, it calls resolve if it was successful or reject if there was an error. The promise object returned by the new Promise constructor has these internal properties:
https://www.golinuxcloud.com › javascript-promise-reject
Master Promise.reject() - Dummies Guide on JavaScriptPromise.reject() returns a Promise object that is rejected immediately with a specified reason. It can be used to simulate error conditions, making it an essential tool in testing promise-based functionalities.
https://fr.javascript.info › promise-basics
Promesse (promise) - JavaScriptreject(error) – si une erreur est survenue, error est l’objet erreur. Donc, pour résumer : l’exécuteur s’exécute automatiquement et tente d’effectuer un travail. Ensuite, il devrait appeler resolve s’il a réussi ou reject s’il y avait une erreur. L’objet promise retourné par le constructeur new Promise a des propriétés internes :
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!'.
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.
