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https://stackoverflow.com › questions › 27759593

How do I wait for a promise to finish before returning the variable of ...

Check the result of console.log(waitForPromise()) if you are uncertain. A check of console.log(result) within the async function will print out what you expect, but the return from the async function happens immediately without blocking and returns a promise.

https://bobbyhadz.com › blog › javascript-wait-promise-resolve-before-returning

Wait for a Promise to Resolve before Returning in JS

You can use the async/await syntax or call the .then() method on a promise to wait for it to resolve. Inside functions marked with the async keyword, you can use await to wait for the promises to resolve before continuing to the next line of the function. index.js.

Wait for a Promise to Resolve before Returning in JS

https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Operators › await

await - JavaScript | MDN - MDN Web Docs

L'expression await interrompt l'exécution d'une fonction asynchrone et attend la résolution d'une promesse. Lorsque la promesse est résolue (tenue ou rompue), la valeur est renvoyée et l'exécution de la fonction asynchrone reprend.

https://developer.mozilla.org › fr › docs › Web › JavaScript › Guide › Using_promises

Utiliser les promesses - JavaScript | MDN - MDN Web Docs

js const wait = (ms) => new Promise((resolve) => setTimeout(resolve, ms)); wait(10 * 1000) .then(() => saySomething("10 seconds")) .catch(failureCallback); Le constructeur Promise prend en argument une fonction et nous permet de la convertir manuellement en une promesse.

https://developer.mozilla.org › fr › docs › Web › JavaScript › Reference › Global_Objects › Promise

Promise - JavaScript | MDN - MDN Web Docs

js let maPremierePromesse = new Promise((resolve, reject) => { // On appelle resolve(...) lorsque notre action asynchrone // a réussi et reject(...) lorsqu'elle a échoué. // Dans cet exemple, on utilise setTimeout(...) pour simuler // du code asynchrone.

https://www.delftstack.com › fr › howto › javascript › javascript-wait-for-promise-to-resolve

Attendez que les promesses soient résolues en JavaScript

Les promesses en JavaScript sont réalisées en 3 étapes, et elles sont les suivantes. Pending : lorsqu’une promesse est en cours d’exécution, on dit qu’elle est en attente. Fulfilled : lorsqu’une promesse termine son exécution avec succès, elle est résolue et renvoie la valeur de l’opération effectuée.

https://stackoverflow.com › questions › 28921127

asynchronous - How to wait for a JavaScript Promise to resolve before ...

I'm wondering if there is any way to get a value from a Promise or wait (block/sleep) until it has resolved, similar to .NET's IAsyncResult.WaitHandle.WaitOne(). I know JavaScript is single-threaded, but I'm hoping that doesn't mean that a function can't yield.

https://byby.dev › js-wait-for-multiple-promises

How to wait for multiple promises in JavaScript - byby.dev

To use Promise.all, you can pass an array of promises to it and then attach a .then() method to handle the resolved array or a .catch() method to handle the rejection reason. For example: Promise.resolve(1), Promise.resolve(2), Promise.resolve(3), ]; // Pass the array to Promise.all.

https://www.delftstack.com › howto › javascript › javascript-wait-for-promise-to-resolve

How to Wait for Promises to Get Resolved in JavaScript

Promises in JavaScript allow us to wait for such operations or tasks to complete their execution, and based on whether the task is fulfilled, we can take further actions. We must create a Promise class object using the new keyword to use promises. Promise takes two arguments, resolve and reject.

https://www.freecodecamp.org › news › javascript-promises-async-await-and-promise-methods

How to Use JavaScript Promises – Callbacks, Async/Await, and Promise ...

How to Create a Promise. To create a promise we need to use the Promise constructor function like this: const promise = new Promise(function(resolve, reject) { }); The Promise constructor takes a function as an argument and that function internally receives resolve and reject as parameters.