What are some examples of async iteration in JavaScript?

What are some examples of async iteration in JavaScript?

Async iteration in JavaScript allows you to work with asynchronous data sources using the for await...of loop. For example, you can iterate over an async iterable like a stream of data.

Can you show me a code example?

Sure! Here's a simple example:

async function* asyncGenerator() {
    yield 'Hello';
    yield 'World';
}

(async () => {
    for await (const value of asyncGenerator()) {
        console.log(value);
    }
})();

What about using async iteration with fetch?

You can use async iteration with the Fetch API to process data in chunks. For example:

async function fetchAndProcess(url) {
    const response = await fetch(url);
    const reader = response.body.getReader();
    while (true) {
        const { done, value } = await reader.read();
        if (done) break;
        console.log(new TextDecoder().decode(value));
    }
}
fetchAndProcess('https://example.com/data');