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 expressexpress get params after ?
GET /something?color1=red&color2=blue
app.get('/something', (req, res) => {
req.query.color1 === 'red' // true
req.query.color2 === 'blue' // true
})
req.params refers to items with a ':' in the URL and req.query refers to items associated with the '?express get url parameters
app.get('/path/:name', function(req, res) {
res.send("tagId is set to " + req.params.name);
});express post
app.post('/signup', async(req, res) => {
const { email, firstName } = req.body
const user = new User({ email, firstName })
const ret = await user.save()
res.json(ret)
})node js express url parameters
// http://localhost:8080/api/1
app.get('/api/:version', function(req, res) {
res.send(req.params.version);
});express post
app.post('/', function (req, res) {
res.send('Got a POST request')
})Copyright © 2021 Codeinu
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