const ws = new WebSocket(`ws://${window.location.host}`); ws.onopen = () => { console.log("Connected to server"); ws.send("Hello from client!"); }; ws.onmessage = event => { console.log(`Message from server: ${event.data}`); }; ws.onclose = () => { console.log("Disconnected from server"); }; $("#submit_user_pwd").on("click", () => { const name = $("#username").val(); const pwd = $("#password").val(); $.ajax({ type: "POST", url: "/test", data: JSON.stringify({ name, pwd }), contentType: "application/json", success: res => { console.log("Success", res); }, error: err => { console.error("Error", err); }, }); });