Express framework installation and start service

One 、 install ：

First of all to node.js Download... On the official website node

Enter the following command to check whether the installation is successful

npm -v

  If the version number is displayed, the installation is successful

npm init --yes

npm i express

Two 、 establish express_test.js file

//  introduce 
const { request } = require('express');
//  Create application objects 
const express = require('express');
//  Create application objects 
const app = express();
//  Create routing rules 
app.get('/',(request,response) => {
    response.send('hello express~');
});
//  Listening port starts service 
app.listen(8000,() => {
    console.log(" Service started ,8000 Port monitoring ...");
})

3、 ... and 、cmd Start service in window

node express_test.js