Install

npm install mz

yarn add mz

MZ - Modernize node.js

Modernize node.js to current ECMAScript specifications!
node.js will not update their API to ES6+ for a while.
This library is a wrapper for various aspects of node.js' API.

Installation and Usage

Set mz as a dependency and install it.

 npm i mz

Then prefix the relevant require()s with mz/:

 var fs = require('mz/fs')

fs.exists(__filename).then(function (exists) {
  if (exists) // do something
})

With ES2017, this will allow you to use async functions cleanly with node's core API:

 const fs = require('mz/fs')


async function doSomething () {
  if (await fs.exists(__filename)) // do something
}

Promisification

Many node methods are converted into promises.
Any properties that are deprecated or aren't asynchronous will simply be proxied.
The modules wrapped are:

child_process
crypto
dns
fs (uses graceful-fs if available)
readline
zlib

 var exec = require('mz/child_process').exec

exec('node --version').then(function (stdout) {
  console.log(stdout)
})

Promise Engine

mz uses any-promise.

FAQ

Can I use this in production?

Yes, Node 4.x ships with stable promises support. For older engines,
you should probably install your own promise implementation and register it with
require('any-promise/register')('bluebird').