JS Promisify
Introduction
JS Promisify is a npm minimal and well-tested async module for NodeJS, that converts NodeJS async style functions to native JS promises (if they're supported by the underlying JavaScript engine, like in Node >= 4.0.0).
For example, it can be used to convert the NodeJS native file system library (fs
), to easily perform file operations with promises.
Install
npm install js-promisify
(add "--save" if you want the module to be automatically added to your project's "package.json" dependencies)
Usage
fun
can be any function with a callback argument that follows the Node JS async function pattern signature (i.e. the callback is the last argument and has a signaturefunction(err, data)
).args
is an array containing all the arguments that need to be passed tofun
, excluding the callback.ctx
(optional) is what the variablethis
should be bound to whenfun
is called with the arguments provided through theargs
array.
Example
const promisify = ;const fs = ; // Same as above, using async / await async { console}
MIT License