Express.JS Middle ware simple Example

Below is our molded  ourpage.js from previous post :

var express = require('express') // import express module

var ourPage = express.Router() // import Router object

ourPage.use(function(req, res, next) { // use 'use' function to declare a middleware and pass next as extra argument


    console.log("First MiddleWare")

    next() // must call next() method. To let know the express that there is extra work to be done

})

ourPage.get('/', function(req, res, next) { // handle the route


    res.send("Hi");

    console.log("Second MiddleWare");

    next();

})

ourPage.use(function(req, res) { // no need to include next argument if you don't want further processing


    console.log("Third MiddleWare")

})

module.exports = ourPage

Console Will Have following Output:-

First MiddleWare
Second MiddleWare
Third MiddleWare

Above situation can be understood by following diagram: