<pre class="shiki github-dark shaku"><code>/** * @param {() =&gt; Promise&lt;any&gt;} func * @param {number} max * @return {Promise} */async function throttlePromises(funcs, max){ const result = []; while (funcs.length) { result.push(...await Promise.all(funcs.splice(0, max).map(item =&gt; item()))); } return result;}</code></pre>

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Say you need to fetch some data through 100 APIs, and as soon as possible. If you use Promise.all(), 100 requests go to your server at the same time, …