https://www.freecodecamp.org › news › javascript-promise-tutorial-how-to-resolve-or-reject...
JavaScript Promise Tutorial – How to Resolve or Reject Promises in JSlet promise = new Promise(function(resolve, reject) { // Make an asynchronous call and either resolve or reject }); In most cases, a promise may be used for an asynchronous operation. However, technically, you can resolve/reject on both synchronous and asynchronous operations.
The Promise.reject() static method returns a Promise object that is rejected with a given reason.
https://www.w3schools.com › jsref › jsref_promise_reject.asp
JavaScript Promise.reject() Method - W3SchoolsJavaScript Promise.reject () Method. Previous JavaScript Promise Reference Next . Example. Promise.reject("Not Allowed"); Try it Yourself » Description. The Promise.reject() method returns a Promise object rejected with a value. Syntax. Promise.reject (message) Parameters. Return Value. Promise Tutorial. catch () finally () then ()
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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.
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://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://www.golinuxcloud.com › javascript-promise-reject
Master Promise.reject() - Dummies Guide on JavaScriptExample 1: Basic Usage. javascript. const rejectedPromise = Promise. reject ('This is a rejection reason.'); rejectedPromise. catch ((reason) => { console. log (reason); // Output: This is a rejection reason. }); Example 2: Using with Async/Await.
https://developer.mozilla.org › fr › docs › Web › JavaScript › Guide › Using_promises
Utiliser les promesses - JavaScript | MDN - MDN Web DocsLa méthode then () renvoie une nouvelle promesse, différente de la première : js. const promise = faireQqc (); const promise2 = promise.then (successCallback, failureCallback); ou encore : js. const promise2 = faireQqc ().then (successCallback, failureCallback);
https://javascript.info › promise-basics
Promise - The Modern JavaScript Tutoriallet promise = new Promise(function(resolve, reject) { resolve("done"); reject(new Error("…")); // ignored setTimeout(() => resolve("…")); // ignored }); The idea is that a job done by the executor may have only one result or an error.
https://stackoverflow.com › questions › 28761365
How to reject (and properly use) Promises? - Stack Overflowreturn new Error('reason'); // calls success function, with error argument. return false; // calls success function with false argument. throw new Error('reason'); // works, but if .catch is missing => BLOW! As you can see by my comments (and per spec), throwing an error works well.
