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hardTechnical2024

Throttled API poll client

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01

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Implement the scenario utility: Throttled API poll client. Discuss edge cases, runtime performance, and alternative paradigms.

js-codingutilityalgorithm
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💡 How to Think About This Problem

When implementing Throttled API poll client in a frontend interview, candidate developers should focus on structural correctness, managing execution bindings, and minimizing performance overhead.

1. Deconstructing the Requirements

To build a robust solution for **Throttl

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04

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Example usage
function poll(fn, validate, interval, maxAttempts) {
  let attempts = 0;
  return new Promise((resolve, reject) => {
    function execute() {
      fn().then(val => {
        attempts++;
        if (validate(val)) resolve(val);
        else if (attempts >= maxAttempts) reject(new Error('Max attempts reached'));
        else setTimeout(execute, interval);
      }).catch(reject);
    }
    execute();
  });
}

// Example placeholder (actual usage requires endpoint)
// poll(() => Promise.resolve({ ok: true }), res => res.ok, 100, 3);
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