WebSocket.js

let ws = new WebSocket("ws://localhost:3000");

const server = {
    connected: false,
    connect: function() {
        console.log("Connected", this.connected);
        ws.onopen = () => {
            console.log("CONNECTED!");
        }
        ws.onerror = (e) => {
            console.log("Error", e);
        }
        return this.connected;
    },
    sendmessage: () => {
        ws.send(JSON.stringify({message: "hi"}));
    }
}

export default server;