New Case Study:See how Anthropic automated 95% of dependency reviews with Socket.Learn More
Socket
Sign inDemoInstall
Socket

es6-async

Package Overview
Dependencies
Maintainers
1
Versions
3
Alerts
File Explorer

Advanced tools

Socket logo

Install Socket

Detect and block malicious and high-risk dependencies

Install

es6-async

Async/Await for ES6 with Generators and Promises

  • 1.0.2
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
3
decreased by-72.73%
Maintainers
1
Weekly downloads
 
Created
Source

es6-async Build Status NPM version

Async/Await for ES6 with Generators and Promises

Implements async/await for ES6 (specifically for Node 6.x which is the current Node versions on the three big FaaS providers: AWS Lambda, Google Cloud Functions and Azure Functions).

See Async/Await with Generators and Promises for a blog post about this project.

Install

Using npm:

$ npm install es6-async

In Node.js:

const makeAsync = require('es6-async')

Usage

Write code the same way you write code with async/await with the difference to use makeAsync instead of the async keyword and replace await with yield. Also note that makeAsync takes a generator defined with the function* syntax.

const makeAsync = require('es6-async')

const timeout = (milliseconds) => new Promise(resolve => setTimeout(resolve, milliseconds))
const random = () => Promise.resolve(Math.random())

const asyncFunc = makeAsync(function* () {
  yield timeout(1000)
  return yield random()
})

asyncFunc().then(v => console.log('Finished', v))

The same code written using async/await:

async function asyncFunc() {
  await timeout(1000)
  return await random()
}

asyncFunc().then(v => console.log('Finished', v))

Caveat

I've found one small difference that needs to be pointed out:

const resultGen = yield Promise.resolve(100) + 100
const resultAsync = await Promise.resolve(100) + 100
// resultGen = "[object Promise]100"
// resultAsync = 200

In the case of yield, Javascript first evaluates Promise.resolve(100) + 100 which it does by converting both to strings and then sends that to yield. The solution to this is to wrap it in parenthesis.

const resultGen = (yield Promise.resolve(100)) + 100
// resultGen = 200

Using with Google Cloud Functions

const makeAsync = require('es6-async')

const timeout = (milliseconds) => new Promise(resolve => setTimeout(resolve, milliseconds))
const random = () => Promise.resolve(Math.random())

const asyncFunc = makeAsync(function* () {
  yield timeout(1000)
  return yield random()
})

module.exports.randomGen = makeAsync(function*(req, res) {
  res.status(200).send('Random value is: ' + (yield asyncFunc()))
})

Keywords

FAQs

Package last updated on 07 Apr 2018

Did you know?

Socket

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install

Related posts

SocketSocket SOC 2 Logo

Product

  • Package Alerts
  • Integrations
  • Docs
  • Pricing
  • FAQ
  • Roadmap
  • Changelog

Packages

npm

Stay in touch

Get open source security insights delivered straight into your inbox.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc