universalify
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- Version published
- Maintainers
- 1
- Weekly downloads
- 62,346,149
- increased by7.04%
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universalify
Make a callback- or promise-based function support both promises and callbacks.
Uses the native promise implementation.
Installation
npm install universalify
API
universalify.fromCallback(fn)
Takes a callback-based function to universalify, and returns the universalified function.
Function must take a callback as the last parameter that will be called with the signature (error, result). universalify does not support calling the callback with three or more arguments, and does not ensure that the callback is only called once.
function callbackFn (n, cb) {
setTimeout(() => cb(null, n), 15)
}
const fn = universalify.fromCallback(callbackFn)
// Works with Promises:
fn('Hello World!')
.then(result => console.log(result)) // -> Hello World!
.catch(error => console.error(error))
// Works with Callbacks:
fn('Hi!', (error, result) => {
if (error) return console.error(error)
console.log(result)
// -> Hi!
})
universalify.fromPromise(fn)
Takes a promise-based function to universalify, and returns the universalified function.
Function must return a valid JS promise. universalify does not ensure that a valid promise is returned.
function promiseFn (n) {
return new Promise(resolve => {
setTimeout(() => resolve(n), 15)
})
}
const fn = universalify.fromPromise(promiseFn)
// Works with Promises:
fn('Hello World!')
.then(result => console.log(result)) // -> Hello World!
.catch(error => console.error(error))
// Works with Callbacks:
fn('Hi!', (error, result) => {
if (error) return console.error(error)
console.log(result)
// -> Hi!
})
License
MIT
FAQs
Make a callback- or promise-based function support both promises and callbacks.
The npm package universalify receives a total of 52,165,027 weekly downloads. As such, universalify popularity was classified as popular.
We found that universalify demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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