https://stackoverflow.com › questions › 40735418
javascript - Return promise from the function - Stack OverflowA Promise tells you that it will execute at some point in time, without telling you when. The then chain will execute whenever the Promise resolves. You can see that in more detail in returnPromise. Here we return a new Promise.
https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Global_Objects › Promise
Promise - JavaScript | MDN - MDN Web DocsLes méthodes promise.then(), promise.catch(), et promise.finally() sont utilisées pour associer une action ultérieure à une promesse lorsque celle-ci devient acquittée. La méthode .then() prend deux arguments : le premier est une fonction de rappel ( callback ) pour le cas de résolution de la promesse et le second argument est une ...
Returns a new Promise object that is rejected with the given reason. Promise.resolve() Returns a Promise object that is resolved with the given value. If the value is a thenable (i.e. has a then method), the returned promise will "follow" that thenable, adopting its eventual state; otherwise, the returned promise will be fulfilled with the value.
https://developer.mozilla.org › en-US › docs › Web › JavaScript › Guide › Using_promises
Using promises - JavaScript | MDN - MDN Web DocsHere's the magic: the then() function returns a new promise, different from the original: js. const promise = doSomething(); const promise2 = promise.then(successCallback, failureCallback);
https://www.w3schools.com › Js › js_promise.asp
JavaScript Promises - W3SchoolsHere 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.
https://javascript.info › promise-basics
Promise - The Modern JavaScript TutorialThe promise object returned by the new Promise constructor has these internal properties: state — initially "pending" , then changes to either "fulfilled" when resolve is called or "rejected" when reject is called.
https://fr.javascript.info › promise-basics
Promesse (promise) - JavaScriptUne promesse (promise) est un objet spécial en JavaScript qui lie le “producteur de code” et le “consommateur de code” ensemble. En comparant à notre analogie c’est la “liste d’abonnement”.
https://runebook.dev › fr › docs › javascript › global_objects › promise
JavaScript - Promise [fr] - Runebook.devDescription. Un Promise est un proxy pour une valeur pas nécessairement connue lors de la création du promise . Il vous permet d'associer des gestionnaires à la valeur de réussite éventuelle ou à la raison de l'échec d'une action asynchrone.
https://stackoverflow.com › questions › 34094806
javascript - Return from a promise then () - Stack OverflowWhen you return something from a then() callback, it's a bit magic. If you return a value, the next then() is called with that value. However, if you return something promise-like, the next then() waits on it, and is only called when that promise settles (succeeds/fails).
https://www.freecodecamp.org › news › javascript-promises-async-await-and-promise-methods
How to Use JavaScript Promises – Callbacks, Async/Await, and Promise ...Promises are one of the most important parts of JavaScript – but they can be confusing and difficult to understand. Many new devs, as well as experienced ones, struggle to fully grasp them. So what is a promise? A promise represents an asynchronous operation whose result will come in the future.
