Package Exports

node-promisify

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Readme

node-promisify

Convert callback function to node native promise.

Function name and other own enumberable properties are preserved, as well as the execution context.

Custom promise can be used instead of the native.

Usage

var promisify = require('node-promisify');
promisify(function async(a, b, c, cb) {
    cb(null, d, e, f);
}).then(function (results) {
    // results is [d, e, f]
});

pfn = promisify(fn, opts)

fn: Function the async function
opts: Object
- promise: Function Promise constructor to be used instead of the native.

Example

var promisify = require('..');
var glob = promisify(require('glob'));
var path = require('path');

glob('*.js', { cwd: path.join(__dirname, 'files') })
    .then(function (files) {
        console.log('promisish style:', files);
    });

glob('*.js', { cwd: path.join(__dirname, 'files') }, function (err, files) {
    console.log('original style:', files);
});

console.log('other methods:', glob.sync('*.js', { cwd: path.join(__dirname, 'files') }));

output:

⌘ node example/glob.js
other methods: [ 'a.js', 'b.js', 'c.js' ]
original style: [ 'a.js', 'b.js', 'c.js' ]
promisish style: [ 'a.js', 'b.js', 'c.js' ]