If you change your Mac, you need to install noed.js and npm to record it
. First visit the official website of node.js (https://nodejs.org/en/download/)
After clicking the download, click install all the way to complete the installation
Then open - terminal - enter node -v to return the currently installed version number to see the picture
Then enter npm -v to get
that the installation is normal,
then open the user directory in Finder (that is, the Mac administrator, click on the sidebar to open the directory, create a Js file, name it helloworld.js, and enter in the js file these contents )
const http = require('http');
const hostname = '127.0.0.1';
const port = 1337;
http.createServer((req, res) => {
res.writeHead(200, { 'Content-Type': 'text/plain' });
res.end('Hello World\n');
}).listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
After the save is successful, open the terminal
Enter node helloworld.js to get
Then copy the following IP address to the browser and open it
This configuration is successful