Node.Js on windows - How to clear console

Being totally new into node.js environment and philosophy i would like answers to few questions. I had downloaded the node.js for windows installer and also node package manager.Windows Cmd prompt is being currently used for running nodejs apps.

1. cls clears the command window or errors in command prompt. Is there a equivalent for node.js ? console.clear does not exist ;( or does it in some other form?

2. I created a server through this code below

   var http = require("http");
   http.createServer(function (request, response) {
       response.writeHead(200, {
           "Content-Type": "text/html"
       });
       response.write("Hello World");
       console.log("welcome world")response.end();
   }).listen(9000, "127.0.0.1");
   

i changed the code to below and refreshed the browser to find that content type does not change, how do i get to see the changes?

var http = require("http");
http.createServer(function(request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.write("Hello World");
  console.log("welcome world")
  response.end();
}).listen(9000,"127.0.0.1");

console.log('\033[2J');

This works on linux. Not sure about windows.

You can "trick" the user using something like this:

var lines = process.stdout.getWindowSize()[1];
for(var i = 0; i < lines; i++) {
    console.log('\r\n');
}

process.stdout.write('\033c');

This also works on windows. Win7 at least.

This clears the console on Windows and puts the cursor at 0,0:

var util = require('util');
util.print("\u001b[2J\u001b[0;0H");

or

process.stdout.write("\u001b[2J\u001b[0;0H");

This is for Linux mainly but is also reported to work in Windows.

There is Ctrl + L in Gnome Terminal that clears the terminal as such. It can be used with Python, Node JS or any Interpreter presumably that uses terminal. I tend to clear many times hence this is very handy. Instaed of doing clear in Gnome Terminal you can just do Ctrl + L, it has nothing to do with the REPL running.