hardDSA

How do you implement a custom Promise.any polyfill?

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01

Understand the problem

Write Promise.any from scratch, ensuring it resolves with the first fulfilled promise, and rejects with an AggregateError if all promises fail.

promisespolyfillasync
02

Attempt it yourself

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03

Study the solution

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Give it an honest attempt first — then compare your thinking with the full walkthrough.

04

Run the code

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05

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