deployment-talks/chat-app/static/js/chat-service.js

const ws = initChatService();

function initChatService() {
    const ws = new WebSocket("ws://localhost:3000/chat-socket");

    ws.onmessage = function (event) {
        console.log(event);
    };
    ws.onopen = function (event) {
        console.log("Opening the socket");
        ws.send(JSON.stringify({ hello: "world" }));
    };
    ws.onclose = function (event) {
        console.log("Closing the socket");
    };
    ws.onerror = function (event) {
        console.log(event);
    };

    return ws;
}