Fetch API & Handling JSON Responses

What functionality does this code implement?

const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), 5000);

try {
  const response = await fetch(url, {
    signal: controller.signal
  });
  clearTimeout(timeoutId);
  return await response.json();
} catch (error) {
  if (error.name === 'AbortError') {
    throw new Error('Request timed out');
  }
  throw error;
}

Request caching
Response validation
Request timeout with cancellation
This implements request timeout with cancellation: 1) Uses AbortController to enable request cancellation, 2) Sets a timeout to abort the request after 5 seconds, 3) Properly cleans up timeout if request succeeds, 4) Differentiates between timeout and other errors, 5) Prevents hanging requests from consuming resources, 6) Essential for maintaining responsive user experience.
Automatic retries

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