Express routing

Express js example

//to run : node filename.js
const express = require('express')
const app = express()
const port = 3000

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

app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))

//visit localhost:3000
// assuming you have done 1) npm init 2) npm install express

Express router file

var express = require('express');
var router = express.Router();

// middleware that is specific to this router
router.use(function timeLog (req, res, next) {
  console.log('Time: ', Date.now());
  next();
});
// define the home page route
router.get('/', function (req, res) {
  res.send('Birds home page');
});
// define the about route
router.get('/about', function (req, res) {
  res.send('About birds');
});

module.exports = router;

Express route parameters

Route path: /users/:userId/books/:bookId
Request URL: http://localhost:3000/users/34/books/8989
req.params: { "userId": "34", "bookId": "8989" }

Source: expressjs.com

Express routing

app.get('/example/b', function (req, res, next) {
  console.log('the response will be sent by the next function ...')
  next()
}, function (req, res) {
  res.send('Hello from B!')
})

Source: expressjs.com

Express route parameters

Route path: /flights/:from-:to
Request URL: http://localhost:3000/flights/LAX-SFO
req.params: { "from": "LAX", "to": "SFO" }

Source: expressjs.com

Express basic routing syntax

app.METHOD(PATH, HANDLER)

Source: expressjs.com

Similar codes

1 vote188 views1 answer
Node express verify account link api
Javascript Express
3 votes198 views1 answer
Authfunctions express
Javascript Express
1 vote193 views1 answer
Javascript express app listen
Javascript Express
0 vote202 views1 answer
Express js jump to above directory
Javascript Express
8 votes201 views3 answers
Request entity too large express
Javascript Express
0 vote179 views1 answer
Express formidable
Javascript Express
0 vote204 views1 answer
Express rate limit redis
Javascript Express
13 votes185 views3 answers
Express request body undefined
Javascript Express
0 vote192 views1 answer
Remove .html from url express js
Javascript Express
0 vote189 views1 answer
Express orm
Javascript Express