Async Error Handling

Use try/catch inside async functions, or attach .catch() to the returned Promise. Both are equivalent — choose one style per function.

Example

// try/catch style
async function fetchData() {
  try { return await api.get("/data"); }
  catch (e) { if (e.status === 404) return []; throw e; }
}
// Caller with .catch
fetchData().then(render).catch(showErrorBanner);
// Helper for safe awaiting
const [data, err] = await fetchData().then(d => [d, null]).catch(e => [null, e]);

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Pro Tip

The [data, err] tuple pattern (like Go) avoids nested try/catch without losing error context.

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