routes expressjs code example

Example 1: nodejs express routing get

const express = require('express');
const mysql = require('mysql');

// Connecting with database
const db = mysql.createConnection({
  host: 'localhost',					// The host you're using
  user: 'yourusername',					// The username you use to enter database
  password: 'yourpassword'				// Your password to your username
});

db.connect((error) => {
  if(error) {
    throw error;
  }
  console.log('MySQL Connected');
});

const app = express();

app.get('yourroute', (request, response) => {
  let sql = 'SELECT * FROM yourtable';
  let query = db.query(sql, (error, result) => {
    if(error) {
      throw error;
    }
    console.log(result)					// Use the result you get back here
  })
});

app.listen('3000', () => {
  console.log('Server is listening on port 3000');
});

Example 2: express route parameters

app.get('/',function(req,res)
{
    res.send("Route path at base address");
});

Example 3: nodejs express routing

// You need to install the following packages
npm install --save mysql express
// And if you don't want to restart your server after every little change
npm install -g nodemon

Example 4: Basic Routing Express.js

app.get('/', function (req, res) {
  res.send('Hello World!')
})

Example 5: express route parameters

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