Web / ES6 Interview questions
What is Promise.race()?
The Promise.race() method returns a promise that fulfills or rejects as soon as one of the promises in an iterable fulfills or rejects, with the value or reason from that promise.
const promise1 = new Promise((resolve, reject) => { setTimeout(resolve, 500, 'one'); }); const promise2 = new Promise((resolve, reject) => { setTimeout(resolve, 100, 'two'); }); Promise.race([promise1, promise2]).then((value) => { console.log(value); // Both resolve, but promise2 is faster }); // expected output: "two"
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