ExpressJS Async Handler

Installation

``bash
yarn add express-async-handlr
`
or
`bash
npm i express-async-handlr
`

Usage

This module can both handle async exception and returning data

First, add these middlewares into your express application

`javascript
import express from 'express';

const app = express();

// middleware that handles async error
app.use((error, req, res, next) => {
console.log({ error })
return res.status(500).json({ message: error?.message });
});

// middleware that handles returning data
app.use((req, res, next) => {
const data = res.locals.data;
return res.status(200).json({ data });
});
`

And then, import express-async-handlr and wrap it onto every async function that needs handing
`javascript
const asyncHandler = require('express-async-handlr')

app.get('/', asyncHandler(async (req, res, next) => {
const users = await userRepository.findAll(); // errors will be automatically handled if any
return users;
}))
`

Without express-async-handlr, you have to do try/catch like this on every function
`javascript
app.get('/', asyncHandler(async (req, res, next) => {
try {
const users = await userRepository.findAll();
res.json({ data: users })
}
catch(e){
next(e)
}
}))
``