<pre class="shiki github-dark shaku"><code>/** * @param {Array&lt;any&gt;} promises - notice that input might contains non-promises * @return {Promise&lt;Array&lt;{status: 'fulfilled', value: any} | {status: 'rejected', reason: any}&gt;&gt;} */function allSettled(promises) { // your code here if (!promises.length) { return Promise.resolve([]); } return new Promise(resolve =&gt; { const res = []; let count = 0; for (let i = 0; i&lt; promises.length; i++) { Promise.resolve(promises[i]).then(val =&gt; { res[i] = { status: 'fulfilled', value: val}; }).catch((reason) =&gt; { res[i] = {status: 'rejected', reason} }).finally(() =&gt;{ count++; if (count === promises.length) { resolve(res); } }) } })}</code></pre>

注意处理空数组。用count统计rejected/resolved的promise数量，跟数组长度一样时resolve。

> The Promise.allSettled() method returns a promise that resolves after all of the given promises have either fulfilled or rejected, with an array of …