What is the output of the following? “`js const p1 = Promise.resolve(1); const p2 = Promise.reject(new Error(‘fail’)); const p3 = Promise.resolve(3); Promise.allSettled([p1, p2, p3]).then(results => { console.log(results.length); }); “`

Question

JavaScript Developer — Hard

What is the output of the following? “`js const p1 = Promise.resolve(1); const p2 = Promise.reject(new Error(‘fail’)); const p3 = Promise.resolve(3); Promise.allSettled([p1, p2, p3]).then(results => { console.log(results.length); }); “`

Accepted Answer

The output will be 3 because `Promise.allSettled` waits for all promises to settle, regardless of their status. In this case, even though `p2` is rejected, it still counts towards the total number of promises.