Express: res.app: get reference to express application instance

res.app

This property holds a reference to the express application instance that is using the middleware.

index.js

'use strict'

const express = require('express')

const app = express()

app.locals.name = 'Chat Application'
app.locals.version = '1.2.31'

app.get('/', (req, res) => {
 res.send('Hello World')
})

app.get('/aboutMe', (req, res) => {
 var info = `Application Name  : ${res.app.locals.name}<br />
  Version : ${res.app.locals.version}`
  
 res.send(info)
})

const port = 3000
app.listen(port, () => console.log(`Application started listening on port ${port}!`));

Run index.js

Open the url ‘http://localhost:3000/aboutMe’ in browser, you will see below message.

Previous                                                 Next                                                 Home