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

  • compatible: Boolean if true, pfn can also be used the same as fn
  • promise: Function Promise constructor to be used instead of the native.

Example

var promisify = require('node-promisify');
var glob = promisify(require('glob'));

glob('*.js', { cwd: './files' }).then(function (files) {
    console.log('promisish:', files);
});

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

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

output:

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