How do you promisify setTimeout in JavaScript?
function delay(ms) { return new Promise(resolve => setTimeout(resolve, ms)); }. Then use await delay(1000) to pause. Node.js provides timers/promises with setTimeoutP for this.
Verify This Answer
Cross-check this information using these trusted sources:
More FAQs in Promisifying Callback-Based APIs in JavaScript
Return new Promise((resolve, reject) => { callbackApi(args, (err, result) => { if (err) reject(err); else resolve(result); }); }). The callback must follow the error-first convention.
A built-in utility that converts a callback-based function (error-first convention) to a promise-based one. Usage: const readFileP = promisify(fs.readFile). Then use with .then or async/await.
Yes. Use require('fs/promises') or require('fs').promises. These provide promise-based versions of fs methods (readFile, writeFile, etc.). No need to promisify manually.
Still have questions?
Browse all our FAQs or reach out to our support team