<pre class="shiki github-dark shaku"><code>/** * @param {() =&gt; Promise&lt;any&gt;} func * @param {number} max * @return {Promise} */// Call the first "max" functions --&gt; returns promise// Whenever a function returns, call the next function in the arrayfunction throttlePromises(funcs, max) { // First "max" promises return async function () { const res = []; while (funcs.length) { const arr = await Promise.all(funcs.splice(0, max).map(x =&gt; x())); res.push(...arr); } return res; }();}</code></pre>

This is my accepted solution

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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, …