mock_graphite/public/main.js

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);
		},
	});
});