await-to-ts

Async await wrapper for easy error handling

Pre-requisites

You need to use Node 7.6 (or later) with esnext target in order to use native async/await functionality. Target ES2015 (Node v4) or ES2016 (node v6) in your TypeScript compiler options if you are using an older version.

Install

yarn add await-to-ts

OR

npm i --save await-to-ts

Usage

import to from 'await-to-ts'

const f = () => Promise.resolve(42)
const g = () => Promise.resolve('42')

async function main() {
  const [err, n] = await to(f())
  if (err) {
    throw err
  }

  console.log(n) // n is a number

  const [err1, s] = await to(g())
  if (err1) {
    throw err1
  }

  console.log(s) // s is a string
}

main().catch(console.err.bind(console))