What are the best practices for async/await in JavaScript?
Always handle errors with try/catch, use Promise.all for parallel operations, for...of for sequential, never await in forEach, limit concurrency for large sets, use Promise.allSettled for partial failure, do not fire and forget, and prefer async/await over .then chains.
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More FAQs in async/await Best Practices in JavaScript
Use try/catch around the await calls. If any await rejects, the catch block runs with the rejection reason. try/catch also catches thrown errors inside the try block.
Prefer async/await. It is more readable (looks synchronous), has better stack traces (easier debugging), and works well with loops (for...of with await). Use .then chains only for complex chaining or when async/await is not available.
Batch with Promise.all: process size items at a time. for (let i = 0; i < items.length; i += size) { await Promise.all(items.slice(i, i + size).map(fn)); }. This avoids overwhelming the server or hitting rate limits.
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