middleware is not being called Express.js-CodePudding

I followed all the docs recomendation and still not working

const express = require('express')
const app = express()
const errorHandler = require('./middleware/errorHandler')

app.use(express.json())
app.use(errorHandler)

app.get('/home', (req,res) => {
console.log('home')
res.send("home")
})

THE MIDDLEWAER FUNCTION IS IN THE MIDDLEWARE FOLDER

const errorHandler = ( err, req, res, next) => {
console.log("error mddleware is working")
next()
}

CodePudding user response：

Add module.exports = errorHandler under your middleware function.

CodePudding user response：

Make sure the error is used correctly. Always put the handler last, before the port listener :

const express = require("express")
const app = express()
const errorHandler = require("./middleware/errorHandler")

app.use(express.json())

app.get("/home", (req, res) => {
  console.log("home")
  throw new Error("error")
  res.send("home")
})

app.use(errorHandler)
app.listen(3000, () => console.log("server running on port 3000"))