simple.websocket.js

function SimpleWebSocket(address) {
    
    if(!("WebSocket" in window)) {
        console.log("WebSocket NOT supported by your Browser!");
        return null
    }

    // Let us open a web socket
    var ws = new WebSocket(address);
        
    ws.onopen = function() {
        // Web Socket is connected, send data using send()
        console.log("Socket is opened...");
    };
        
    ws.onmessage = function (evt) { 
        var received_msg = evt.data;
        console.log("Message is received...", received_msg);
    };
        
    ws.onclose = function() {     
        // websocket is closed.
        console.log("Connection is closed..."); 
    };

    console.log("WebSocket is supported by your Browser!");
    return ws;
}


const address = "ws://127.0.0.1:8010"; 
var ws = SimpleWebSocket(address);
ws?.send("My awesome message");
ws?.send("My second awesome message");

websocket.test.js

var msg = "My awesome message";
const address = "ws://127.0.0.1:8010";

(function WebSocketTest() {
	
	if ("WebSocket" in window) {
		console.log("WebSocket is supported by your Browser!");
		
		// Let us open a web socket
		var ws = new WebSocket(address);
		 
		ws.onopen = function() {
		
			// Web Socket is connected, send data using send()
			ws.send(msg);
			console.log("Message is sent...");
		};
		 
		ws.onmessage = function (evt) { 
			var received_msg = evt.data;
			console.log("Message is received...", received_msg);
		};
		 
		ws.onclose = function() { 
			
			// websocket is closed.
			console.log("Connection is closed..."); 
		};
	} else {
		
		// The browser doesn't support WebSocket
		console.log("WebSocket NOT supported by your Browser!");
	}
})()