In this example, we will create a Hello World application for Node.js.
Let’s start with a simple example. I have installed Node.js on Windows and have a Node directory in C:\ drive. In command prompt, cd to this directory.
In that directory is a JavaScript file that writes out a console log “Hello World”:
To run the file, enter:
node HelloWorld.js
Hello World is returned by Node.
Now create a new file HelloWorldWS.js to run a web server. Enter the following code:
const http = require('http');
const hostname = '127.0.0.1';
const port = 7000;
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}/`);
});Run the code. Node returns:
If we go to a web browser, we can see the web server is running:
Pressing CTRL-C will stop the code from running. Refreshing the web browser will produce an error as the web server is now not running.
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