Fetch API & Handling JSON Responses

What is the key difference between these two approaches?

const urls = ['api/1', 'api/2', 'api/3'];
async function fetchSequential(urls) {
  const results = [];
  for (const url of urls) {
    const response = await fetch(url);
    results.push(await response.json());
  }
  return results;
}

async function fetchConcurrent(urls) {
  const responses = await Promise.all(urls.map(url => fetch(url)));
  return Promise.all(responses.map(r => r.json()));
}

Error handling capability
Memory usage
Request timing and order
The key difference is in request timing: 1) fetchSequential processes requests one at a time, 2) fetchConcurrent sends all requests simultaneously, 3) Sequential ensures strict order but is slower, 4) Concurrent is faster but may strain server resources, 5) Sequential better for dependent requests, 6) Choice depends on API requirements and constraints.
Response format

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