Let us make a very simple web application that greets the user with a hello. Write the following code in a file, and name it helloweb.js:
var http = require("http");
http.createServer(function(request, response) {
response.writeHead(200, {"Content-Type": "text/html"});
response.write("<html>");
response.write("<head><title>Node.js</title></head>");
response.write("<body>Hello Web</body>");
response.write("</html>");
response.end();
}).listen(9999);To run the previous piece of code, execute helloweb.js in Node.js:
node helloweb.js
And then open http://localhost:9999/ in your browser. You should see a page saying Hello Web. There is a lot going on here! So let us walk through the code and understand what is going on.
The very first line of code introduces us to one of the fundamental building blocks of Node.js, the module system. Node.js has a very simple module system built on CommonJS. Those familiar with frontend development...