express-async-handlr
v0.1.2
Published
Async handler for Express router. Both handle async error and centralize response
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ExpressJS Async Handler
Installation
yarn add express-async-handlr
or
npm i express-async-handlr
Usage
This module can both handle async exception and returning data
First, add these middlewares into your express application
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
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
app.get('/', asyncHandler(async (req, res, next) => {
try {
const users = await userRepository.findAll();
res.json({ data: users })
}
catch(e){
next(e)
}
}))