Aug 30, 2013 · There are ways to cheat, of course. promise.inspect() will return an object describing the state of the promise, like {state: "fulfilled", value: value} if it’s ready, or {state: "rejected", error} if it failed, or {state: "pending"}, if it is not yet ready.

Nov 13, 2015 · Results can be either array of results or object having values as results. Both results - fulfilled , rejected - should be same type of data structure. There are multiple possible strategies depending upon the specifics of what you're trying to do: Here's one option: return p.then(function(array) { return someFunction(item).then(function(val) {

Apr 30, 2021 · You have to change this to promise.catch(e => { promise.rejected = true; return Promise.reject(e)). In other words, .catch takes an rejected promise and "catches" it, and safely puts it back on the path of success.

Feb 11, 2025 · The Promise.all () static method takes an iterable of promises as input and returns a single Promise. This returned promise fulfills when all of the input's promises fulfill (including when an empty iterable is passed), with an array of the fulfillment values. It rejects when any of the input's promises rejects, with this first rejection reason.

Dec 15, 2020 · romise.allSettled([promises]) - This method waits for all promises to settle (resolve/reject) and returns their results as an array of objects. The results will contain a state (fulfilled/rejected) and value, if fulfilled.

May 22, 2023 · JavaScript Promise any () method is a static method that takes an array of promises as a parameter and returns the first fulfilled promise. It returns a rejected value when all of the promises in the array return rejects or if the array is empty.

Sep 3, 2024 · To handle the result of a promise, you use .then() for fulfillment and .catch() for rejection: .then(result => console.log(result)) .catch(error => console.error(error)); async/await is a...

23 hours ago · In JavaScript, the Promise.allSettled() method allows for concurrent handling of multiple promises and returns a single promise. This promise resolves with a...

Apr 3, 2025 · The Promise.resolve() static method "resolves" a given value to a Promise. If the value is a promise, that promise is returned; if the value is a thenable, Promise.resolve() will call the then() method with two callbacks it prepared; otherwise the …

Apr 10, 2025 · Appends fulfillment and rejection handlers to the promise, and returns a new promise resolving to the return value of the called handler, or to its original settled value if the promise was not handled (i.e., if the relevant handler onFulfilled or onRejected is not a function).