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 url parameters
app.get('/path/:name', function(req, res) {
res.send("tagId is set to " + req.params.name);
});node js express url parameters
// http://localhost:8080/api/1
app.get('/api/:version', function(req, res) {
res.send(req.params.version);
});post method with node js and express
const generateId = () => {
const maxId = notes.length > 0
? Math.max(...notes.map(n => n.id))
: 0
return maxId + 1
}
app.post('/api/notes', (request, response) => {
const body = request.body
if (!body.content) {
return response.status(400).json({
error: 'content missing'
})
}
const note = {
content: body.content,
important: body.important || false,
date: new Date(),
id: generateId(),
}
notes = notes.concat(note)
response.json(note)
})Copyright © 2021 Codeinu
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