sb-promisify

2.0.2 • Public • Published

Promisify

A node module to help you convert callback-style functions to promises

Installation

npm install --save sb-promisify

API

function promisifyAll(object, throwError = true): Object
function promisify(callback, throwError = true): Function
 
export default promisify
export { promisify, promisifyAll }

Example Usage

import fs from 'fs'
import promisify from 'sb-promisify'
 
const readFile = promisify(fs.readFile)
 
readFile('/etc/passwd', 'utf8').then(function(contents) {
  console.log(contents)
}, function() {
  console.error('Unable to read file')
})
import fs from 'fs'
import { promisifyAll } from 'sb-promisify'
 
const promisedFS = promisifyAll(fs)
 
promisedFS.readFileAsync('/etc/passwd', 'utf8').then(function(contents) {
  console.log(contents)
})
promisedFS.readFile('/etc/passwd', 'utf8', function(contents) {
  console.log(contents)
})

If you set throwError to false, here's how it would react

'use babel'
 
import fs from 'fs'
import promisify from 'sb-promisify'
 
const access = promisify(fs.access, false)
const readFile = promisify(fs.readFile, false)
 
readFile('/etc/passwd').then(function(contents) {
  if (contents === false) {
    console.error('Unable to read file')
  } else {
    console.log(contents.toString('utf8'))
  }
})
 
access('/etc/passwd').then(function(access) {
  console.log('access', access) // true or false
})

License

This module is licensed under the terms of MIT License. Check the LICENSE file for more info.

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Install

npm i sb-promisify

Weekly Downloads

6,794

Version

2.0.2

License

MIT

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