What is the difference between Promise.all and Promise.race in JavaScript?

Can you explain the difference between Promise.all and Promise.race in JavaScript?

Sure! Promise.all takes an array of promises and resolves when all of them have resolved, or rejects if any promise rejects. On the other hand, Promise.race resolves or rejects as soon as one of the promises in the array resolves or rejects.

Can you give me an example of when to use each?

Absolutely! Use Promise.all when you need all results, like fetching multiple resources. Use Promise.race when you want the first result, like a timeout or the first successful API response.

What happens if one of the promises in Promise.all fails?

If any promise in Promise.all fails, the entire operation fails and returns the error from the first rejected promise.

And what about Promise.race? Does it wait for all promises?

No, Promise.race does not wait for all promises. It resolves or rejects as soon as the first promise settles, whether it resolves or rejects.