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Explain async iterators and for-await-of.

Mid JavaScript
Quick Answer Async iterators yield Promises instead of plain values. for await...of loops consume them: for await (const chunk of readableStream) { process(chunk); }. Used with streams, paginated APIs, or any async data source that produces values over time. Define with Symbol.asyncIterator. Native Node.js streams implement async iteration.

Answer

Async iterators allow iteration over asynchronous data streams.

for-await-of simplifies consuming async sequences.

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