Mastering JavaScript Promises

Mastering JavaScript Promises: , , , and 🚀

Handling multiple asynchronous operations efficiently is a crucial skill in JavaScript. Let’s dive into four key Promise methods that help manage concurrent async tasks like a pro!

Promise.all()

This method runs multiple promises in parallel and waits for all of them to resolve. If any promise fails, the entire is rejected immediately. It’s best used when all tasks must be completed successfully before proceeding.

Promise.allSettled()

Unlike , this method waits for all promises to be completed, regardless of success or failure. It’s useful when you want the result of each task, no matter the outcome.

Promise.any()

This one resolves as soon as any of the given promises succeeds. If all fail, it rejects with a listing of all failure reasons. It’s great when you need the first successful response.

Promise.race()

Returns the result of the first promise to settle, whether it succeeds or fails. Ideal when you only care about the fastest response.

When to Use What?

Use when all tasks must be completed successfully.

Use when you need results from all tasks, regardless of success/failure.

Use when you need the first successful response.

Use when speed is your priority and you don't care about success/failure.

Mastering these methods can help you write efficient, resilient, and scalable async code!