kchoo-q

A wrapper around ES6 Promises, based on https://github.com/kriskowal/q

Installation

$ npm install kchoo-q

Usage:

const fs = require('fs');
const $q = require('kchoo-q');

const readFileAsyncWithPromises = $q.promisify(fs.readFile, fs);

readFileAsyncWithPromises('./sample.txt').
  then(data => {
    // here's your file
  }).
  catch(err => {
    // oh no
  });

To do this normally with Promises, you'd need to do something like:

const readFileAsyncWithPromises = new Promise((resolve, reject) => {
  fs.readFile('./sample.txt', function (err, data) {
    if (err) {
      reject(err);
    } else {
      resolve(data);
    }
  });
});

readFileAsyncWithPromises.
  then(...).
  catch(...);

There is also a $q.defer(), which works the way you'd expect it to work (if you've used Q-esque libraries):

const deferred = $q.defer();

fs.readFile('./sample.txt', function (err, data) {
  if (err) {
    deferred.reject(err);
  } else {
    deferred.resolve(data);
  }
});

deferred.promise.
  then(...).
  catch(...);