What is the Promise.allSettled method in JavaScript?

Can you explain what Promise.allSettled does in JavaScript?

Sure! Promise.allSettled is a method that takes an array of promises and returns a single promise that resolves when all of the promises have either resolved or rejected.

What does the result look like when using Promise.allSettled?

The result is an array of objects, each representing the outcome of each promise. Each object has a 'status' property that can be 'fulfilled' or 'rejected', and a 'value' or 'reason' property depending on the outcome.

Can you give me an example of how to use it?

Certainly! Here's a simple example:

const promises = [
    Promise.resolve(3),
    Promise.reject('error'),
    Promise.resolve(5)
];

Promise.allSettled(promises).then(results => {
    console.log(results);
});

This will log an array with the results of each promise.

When should I use Promise.allSettled instead of Promise.all?

Use Promise.allSettled when you want to wait for all promises to complete, regardless of whether they succeed or fail. This is useful when you need the results of all promises, even if some fail.