Code Completion 5 Challenges

Complete the code: fetch(keepalive)

Fill in the missing superset flags — and the guarantee it still cannot give you.

Intermediate ~4 min read

The flag that lets the request outlive the page.

js Your answer

await fetch(url, {
  method: 'POST',
  body,
  : true,
});

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js Your answer

await fetch(url, {
  method: 'POST',
  body,
  keepalive: true,
  headers: { '': `Bearer ${token}` },
});

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js Your answer

await fetch(url, {
  method: 'POST',
  body,
  keepalive: true,
  credentials: '',
});

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js Your answer

const res = await fetch(url, { method: 'POST', body, keepalive: true });
if (!res.) throw new Error(`collector said ${res.status}`);

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js Your answer

// fetch(keepalive) MAY outlive the page, but only sendBeacon
// carries the spec's  on the hidden transition.

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