The Promise Constructor: Wrapping Old Callbacks
The `Promise` constructor turns old callback-style functions into modern promises you can `await`. Use it to "promisify" APIs like `setTimeout` that don't return promises. The footgun is wrapping already-promise-based code, creating unnecessary complexity.
The `Promise` constructor is a wrapper, turning old callback-style functions into modern promises you can `await`. It's your bridge from the callback-hell of the past to clean `async/await` syntax. Use it for legacy APIs like `fs.readFile` or `setTimeout` that predate native promises. The biggest footgun is wrapping code that already returns a promise, creating a needless and error-prone "Promise wrapper" anti-pattern.
Read the original → developer.mozilla.org
- #javascript
- #async
- #promise
- #web-api
Get five bites like this every day.
Tezvyn delivers a daily feed of 60-second tech bites with quizzes to lock in what you learn.