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 › en-US › docs › Web › JavaScript › Guide › Using_promises
Using promises - JavaScript | MDN - MDN Web DocsSince most people are consumers of already-created promises, this guide will explain consumption of returned promises before explaining how to create them. Essentially, a promise is a returned object to which you attach callbacks, instead of passing callbacks into a function.
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://stackoverflow.com › questions › 29516390
javascript - How can I access the value of a promise? - Stack OverflowReturn a value → PromiseB is resolved immediately, and the value is passed to the success handler of promiseB. Return a promise → When resolved, promiseB will be resolved. When rejected, promiseB will be rejected. The value passed to the promiseB's then handler will be the result of the 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 ...
Appends a handler to the promise, and returns a new promise that is resolved when the original promise is resolved. The handler is called when the promise is settled, whether fulfilled or rejected. Promise.prototype.then()
https://javascript.info › promise-chaining
Promises chaining - The Modern JavaScript TutorialReturning promises. A handler, used in .then(handler) may create and return a promise. In that case further handlers wait until it settles, and then get its result. For instance:
https://web.dev › articles › promises
JavaScript Promises: an introduction | Articles - web.devPromises have arrived in JavaScript! [Fireworks explode, glittery paper rains from above, the crowd goes wild] At this point you fall into one of these categories: People are cheering around you, but you're not sure what all the fuss is about. Maybe you're not even sure what a "promise" is.
https://dev.to › ramonak › javascript-how-to-access-the-return-value-of-a-promise-object-1bck
Javascript: How to access the return value of a Promise objectIt is the fetch() function that returns a value, which is a Promise instance. It is the Promise instance on which you call the then() method, passing in a callback function, which will be eventually be fired when the async code finishes (and internally, calls resolve() ).
https://javascript.info › promise-api
Promise API - The Modern JavaScript TutorialPromise.all takes an iterable (usually, an array of promises) and returns a new promise. The new promise resolves when all listed promises are resolved, and the array of their results becomes its result.
