ES2024 introduces Promise.withResolvers(), streamlining promise creation and management. Let's dive in.

The Problem

Creating a promise with external resolve/reject functions often led to verbose code:

let resolve, reject;
const promise = new Promise((res, rej) => {
  resolve = res;
  reject = rej;
});

Enter Promise.withResolvers

const { promise, resolve, reject } = Promise.withResolvers();

One line. Clean. Efficient.

Use Cases

1. Cleaner async queue implementation
2. Simplified event-based programming
3. More readable test utilities

Performance

Slightly faster than traditional methods. Negligible in most cases, but could matter in high-frequency operations.

Conclusion

Promise.withResolvers() isn't revolutionary, but it's a quality-of-life improvement that makes JavaScript a bit more pleasant to write.

Try it in your next project and let me know what you think!

javascript #es2024