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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WebSocket Chat</title>
<!-- Bootstrap -->
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container mt-4">
<h1 class="text-center">WebSocket Chat</h1>
<div id="usernameSection" class="mb-3">
<input id="usernameInput" type="text" class="form-control" placeholder="Enter your username" autocomplete="off" />
<button id="setUsername" class="btn btn-primary mt-2">Set Username!</button>
</div>
<ul id="messages" class="list-unstyled border p-3 rounded"></ul>
<div class="d-flex align-items-center">
<form id="form" class="form-inline mt-3 d-none">
<input id="messageInput" type="text" class="form-control mr-2" placeholder="Type your message here..." autocomplete="off" />
<button type="submit" class="btn btn-primary">Send</button>
</form>
</div>
</div>
<script>
let ws;
let username = '';
document.getElementById("setUsername").addEventListener("click", () => {
username = document.getElementById("usernameInput").value.trim();
if (username) {
document.getElementById("usernameSection").classList.add("d-none");
document.getElementById("form").classList.remove("d-none");
ws = new WebSocket("ws://localhost:8080/chat");
ws.onopen = () => {
console.log("Connected to the WebSocket server.");
};
ws.onmessage = (event) => {
const messagesList = document.getElementById("messages");
const messageItem = document.createElement("li");
messageItem.textContent = event.data;
messagesList.appendChild(messageItem);
};
ws.onclose = () => {
console.log("Disconnected from the WebSocket server.");
};
document.getElementById("form").addEventListener("submit", (event) => {
event.preventDefault();
const input = document.getElementById("messageInput");
const message = input.value;
if (message) {
ws.send(JSON.stringify({ username, message })); // Send it for the backend to read
input.value = "";
}
});
} else {
alert("Please enter a username.");
}
});
</script>
</body>
</html>