Can u please explain with a very basic example as how cilent-server communication happens via WebSocket

var webSocket;



//Step 1: Instantiate the WebSocket object

var webSocket = new WebSocket('ws://echo.websocket.org');



//check webSocket is not 'undefined and null'

if(!webSocket){

	

	//Step 2: Check if the websocket is in OPEN state and henceforth the communication can be establish

	if(webSocket.readyState == webSocket.OPEN){

	

	//Step 3: Client send a message to the server once the connection opens

	webSocket.send("Message from Client");



	//Step 4: Server sends a response back to the client

	webSocket.onmessage = function(e){

		console.log("Message from Server" + e.data);

	}

    }

}