Node.js · Junior · Question 36 of 75

What does `util.promisify` do?

1Makes any synchronous function run in another thread
2Converts a promise into a callback
✓Correct answer: Turns a function that takes an error-first callback into a function that returns a promise

Explanation

It's useful for old APIs and libraries that only support callbacks. The opposite helper is util.callbackify.

Further reading

Node.js API: Util ↗

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