Expressify: Use Async functions with Express

If you want to use async functions with Express, there’s a simple hack for that: wrap your async function in this expressify utility function.

function expressify(fn) {
  return (req, res, next) => {
    fn(req, res, next).catch(next)
  }
}

Usage:

import { setTimeout } from 'timers/promises'

async function myAsyncHelloWord(req, res, next) {
  await setTimeout(1337);
  res.send('Hello World!')
}

app.get('/', expressify(myAsyncHelloWord))
# Javascript # Node # Express
Tim Alby avatar

I'm a software engineer working freelance as a full-stack web developer. My most common languages are PostgreSQL, Node, Rails and React.

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