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 expressreact post request
componentDidMount() {
// Simple POST request with a JSON body using fetch
const requestOptions = {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ title: 'React POST Request Example' })
};
fetch('https://jsonplaceholder.typicode.com/posts', requestOptions)
.then(response => response.json())
.then(data => this.setState({ postId: data.id }));
}node express post request json
var express = require('express');
var app = express();
app.use(express.json()); // built-in middleware for express
app.post('/', function(request, response){
let myJson = request.body; // your JSON
let myValue = request.body.myKey; // a value from your JSON
response.send(myJson); // echo the result back
});
app.listen(3000);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);
});Copyright © 2021 Codeinu
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