Node.js

2019-03-19 in blog on iot, hackathon

Node.js is an open-source, cross-platform JavaScript run-time environment that executes JavaScript code outside of a browser. JavaScript is used primarily for client-side scripting, in which scripts written in JavaScript are embedded in a webpage’s HTML and run client-side by a JavaScript engine in the user’s web browser. wiki

1. Getting started with Node.js

Getting started with Node.js

1. Install Node.js
2. How do I start with Node.js after I installed it?
   • create a file name app.js, and paste the following code:

    const http = require('http');
    const hostname = '127.0.0.1';
    const port = 3000;
   
    const server = http.createServer((req, res) => {
        res.statusCode = 200;
        res.setHeader('Content-Type', 'text/plain');
        res.end('Hello World\n');
    });
   
    server.listen(port, hostname, () => {
        console.log(`Server running at http://${hostname}:${port}/`);
    });
   

    $ node app.js
   

   • visit http://localhost:3000/
3. Documents