AI实现在线聊天室--02

ze_juejin
325 阅读8分钟

上篇实现了基本的聊天室：AI实现在线聊天室--01 这篇在上次基础上做个完善（本次优化只有界面显示优化，还有一些代码逻辑优化下篇完成）

现代化WebSocket聊天室设计

下面是一个优化设计的现代化聊天室，具有简洁美观的界面和增强的用户体验。

设计特点

  1. 现代化UI：采用卡片式设计、圆角元素和柔和的阴影

  2. 响应式布局：适配不同屏幕尺寸

  3. 色彩系统：使用主色调和强调色

  4. 动画效果：平滑的过渡和消息出现动画

  5. 改进的用户体验：

    • 消息发送状态反馈
    • 更好的时间显示格式
    • 用户头像占位符
    • 消息气泡设计

效果图预览

image.png

完整HTML代码

html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Modern WebSocket 聊天室</title>
    <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">
    <style>
        :root {
            --primary-color: #4361ee;
            --secondary-color: #3f37c9;
            --accent-color: #4895ef;
            --dark-color: #2b2d42;
            --light-color: #f8f9fa;
            --success-color: #4cc9f0;
            --warning-color: #f72585;
            --gray-color: #adb5bd;
            --light-gray: #e9ecef;
            --message-bg: #ffffff;
            --own-message-bg: #e3f2fd;
            --system-message-bg: #f8f9fa;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Roboto', sans-serif;
            background-color: #f5f7fa;
            color: var(--dark-color);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .chat-app {
            display: flex;
            height: 90vh;
            background-color: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        /* 侧边栏样式 */
        .sidebar {
            width: 300px;
            background-color: var(--dark-color);
            color: white;
            padding: 20px;
            display: flex;
            flex-direction: column;
        }

        .app-header {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
        }

        .app-logo {
            font-size: 24px;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
        }

        .app-logo i {
            margin-right: 10px;
            color: var(--accent-color);
        }

        .user-profile {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--accent-color);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-weight: bold;
            font-size: 20px;
        }

        .user-info {
            flex-grow: 1;
        }

        .username {
            font-weight: 500;
            margin-bottom: 5px;
        }

        .user-status {
            font-size: 12px;
            color: var(--gray-color);
            display: flex;
            align-items: center;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--success-color);
            margin-right: 5px;
        }

        .user-list-title {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--gray-color);
            margin-bottom: 15px;
        }

        .user-list {
            flex-grow: 1;
            overflow-y: auto;
        }

        .user-item {
            display: flex;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .user-item:hover {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 10px;
        }

        .user-item .avatar {
            width: 40px;
            height: 40px;
            font-size: 16px;
        }

        .user-item .username {
            font-size: 14px;
            margin-bottom: 0;
        }

        /* 主聊天区域 */
        .chat-area {
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .chat-header {
            padding: 20px;
            border-bottom: 1px solid var(--light-gray);
            display: flex;
            align-items: center;
        }

        .chat-title {
            font-weight: 500;
            font-size: 18px;
        }

        .messages-container {
            flex-grow: 1;
            padding: 20px;
            overflow-y: auto;
            background-color: var(--light-color);
        }

        .message {
            display: flex;
            margin-bottom: 20px;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .message-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--accent-color);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-weight: bold;
            color: white;
            flex-shrink: 0;
        }

        .message-content {
            max-width: 70%;
        }

        .message-info {
            display: flex;
            align-items: center;
            margin-bottom: 5px;
        }

        .message-username {
            font-weight: 500;
            margin-right: 10px;
        }

        .message-time {
            font-size: 12px;
            color: var(--gray-color);
        }

        .message-text {
            padding: 12px 16px;
            border-radius: 18px;
            background-color: var(--message-bg);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            position: relative;
            word-break: break-word;
        }

        .message-text:after {
            content: '';
            position: absolute;
            left: -8px;
            top: 12px;
            width: 0;
            height: 0;
            border-top: 8px solid transparent;
            border-bottom: 8px solid transparent;
            border-right: 8px solid var(--message-bg);
        }

        .own-message {
            justify-content: flex-end;
        }

        .own-message .message-content {
            order: -1;
            margin-right: 15px;
        }

        .own-message .message-text {
            background-color: var(--own-message-bg);
        }

        .own-message .message-text:after {
            left: auto;
            right: -8px;
            border-right: none;
            border-left: 8px solid var(--own-message-bg);
        }

        .system-message {
            justify-content: center;
        }

        .system-message .message-text {
            background-color: var(--system-message-bg);
            color: var(--gray-color);
            font-size: 13px;
            padding: 8px 16px;
        }

        .system-message .message-text:after {
            display: none;
        }

        .input-area {
            padding: 15px 20px;
            border-top: 1px solid var(--light-gray);
            display: flex;
            align-items: center;
        }

        .message-input {
            flex-grow: 1;
            padding: 12px 16px;
            border: 1px solid var(--light-gray);
            border-radius: 24px;
            outline: none;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .message-input:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 2px rgba(72, 149, 239, 0.2);
        }

        .send-button {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            border: none;
            margin-left: 10px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .send-button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }

        .send-button:disabled {
            background-color: var(--gray-color);
            cursor: not-allowed;
            transform: none;
        }

        /* 用户名设置弹窗 */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
        }

        .modal {
            background-color: white;
            border-radius: 12px;
            padding: 30px;
            width: 100%;
            max-width: 400px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            animation: modalFadeIn 0.3s ease;
        }

        @keyframes modalFadeIn {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .modal-header {
            margin-bottom: 20px;
            text-align: center;
        }

        .modal-title {
            font-size: 24px;
            font-weight: 500;
            color: var(--dark-color);
            margin-bottom: 10px;
        }

        .modal-subtitle {
            color: var(--gray-color);
            font-size: 14px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--light-gray);
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .form-input:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 2px rgba(72, 149, 239, 0.2);
        }

        .submit-button {
            width: 100%;
            padding: 14px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .submit-button:hover {
            background-color: var(--secondary-color);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .chat-app {
                flex-direction: column;
                height: 100vh;
                border-radius: 0;
            }

            .sidebar {
                width: 100%;
                height: auto;
            }

            .user-list {
                display: none;
            }

            .message-content {
                max-width: 80%;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="chat-app">
            <!-- 侧边栏 -->
            <div class="sidebar">
                <div class="app-header">
                    <div class="app-logo">
                        <i class="fas fa-comments"></i>
                        <span>Modern Chat</span>
                    </div>
                </div>

                <div class="user-profile">
                    <div class="avatar" id="user-avatar">U</div>
                    <div class="user-info">
                        <div class="username" id="sidebar-username">未设置用户名</div>
                        <div class="user-status">
                            <span class="status-dot"></span>
                            <span id="connection-status">离线</span>
                        </div>
                    </div>
                </div>

                <div class="user-list-title">在线用户 (<span id="online-count">0</span>)</div>
                <div class="user-list" id="user-list-container">
                    <!-- 用户列表将通过JavaScript动态生成 -->
                </div>
            </div>

            <!-- 主聊天区域 -->
            <div class="chat-area">
                <div class="chat-header">
                    <div class="chat-title">群聊</div>
                </div>

                <div class="messages-container" id="messages-container">
                    <!-- 消息将通过JavaScript动态生成 -->
                    <div class="message system-message">
                        <div class="message-text">欢迎来到Modern Chat！请设置您的用户名开始聊天。</div>
                    </div>
                </div>

                <div class="input-area">
                    <input type="text" class="message-input" id="message-input" placeholder="输入消息..." disabled>
                    <button class="send-button" id="send-button" disabled>
                        <i class="fas fa-paper-plane"></i>
                    </button>
                </div>
            </div>
        </div>
    </div>

    <!-- 用户名设置弹窗 -->
    <div class="modal-overlay" id="username-modal">
        <div class="modal">
            <div class="modal-header">
                <div class="modal-title">欢迎来到Modern Chat</div>
                <div class="modal-subtitle">请设置您的用户名以开始聊天</div>
            </div>
            <div class="form-group">
                <input type="text" class="form-input" id="username-input" placeholder="输入用户名" autofocus>
            </div>
            <button class="submit-button" id="set-username">开始聊天</button>
        </div>
    </div>

    <script>
        // DOM元素
        const messagesContainer = document.getElementById('messages-container');
        const messageInput = document.getElementById('message-input');
        const sendButton = document.getElementById('send-button');
        const usernameInput = document.getElementById('username-input');
        const setUsernameButton = document.getElementById('set-username');
        const usernameModal = document.getElementById('username-modal');
        const userListContainer = document.getElementById('user-list-container');
        const sidebarUsername = document.getElementById('sidebar-username');
        const userAvatar = document.getElementById('user-avatar');
        const connectionStatus = document.getElementById('connection-status');
        const onlineCount = document.getElementById('online-count');

        // 连接状态
        let isConnected = false;
        let username = '';
        let userColor = '';
        let socket;

        // 初始化WebSocket连接
        function initWebSocket() {
            socket = new WebSocket('ws://localhost:8080');
            
            socket.addEventListener('open', (event) => {
                console.log('Connected to WebSocket server');
                isConnected = true;
                connectionStatus.textContent = '在线';
            });
            
            socket.addEventListener('message', (event) => {
                const data = JSON.parse(event.data);
                
                if (data.type === 'message') {
                    addMessage(data);
                } else if (data.type === 'userList') {
                    updateUserList(data.users);
                    onlineCount.textContent = data.users.length;
                }
            });
            
            socket.addEventListener('close', (event) => {
                console.log('Disconnected from WebSocket server');
                isConnected = false;
                connectionStatus.textContent = '离线';
                
                addSystemMessage('与服务器的连接已断开');
                
                // 禁用输入
                messageInput.disabled = true;
                sendButton.disabled = true;
                
                // 尝试重新连接
                setTimeout(initWebSocket, 5000);
            });
            
            socket.addEventListener('error', (event) => {
                console.error('WebSocket error:', event);
            });
        }

        // 添加消息到聊天界面
        function addMessage(data) {
            const messageEl = document.createElement('div');
            
            if (data.username === '系统') {
                messageEl.className = 'message system-message';
                messageEl.innerHTML = `
                    <div class="message-text">${data.content}</div>
                `;
            } else {
                const isOwnMessage = data.username === username;
                messageEl.className = `message ${isOwnMessage ? 'own-message' : ''}`;
                
                const avatarText = data.username.charAt(0).toUpperCase();
                const time = formatTime(data.timestamp);
                
                messageEl.innerHTML = `
                    <div class="message-avatar" style="background-color: ${data.color}">${avatarText}</div>
                    <div class="message-content">
                        <div class="message-info">
                            <div class="message-username" style="color: ${data.color}">${data.username}</div>
                            <div class="message-time">${time}</div>
                        </div>
                        <div class="message-text">${data.content}</div>
                    </div>
                `;
            }
            
            messagesContainer.appendChild(messageEl);
            messagesContainer.scrollTop = messagesContainer.scrollHeight;
        }

        // 添加系统消息
        function addSystemMessage(text) {
            const messageEl = document.createElement('div');
            messageEl.className = 'message system-message';
            messageEl.innerHTML = `
                <div class="message-text">${text}</div>
            `;
            messagesContainer.appendChild(messageEl);
            messagesContainer.scrollTop = messagesContainer.scrollHeight;
        }

        // 更新用户列表
        function updateUserList(users) {
            userListContainer.innerHTML = '';
            
            users.forEach(user => {
                if (user.username === username) return; // 不显示自己
                
                const userEl = document.createElement('div');
                userEl.className = 'user-item';
                userEl.innerHTML = `
                    <div class="avatar" style="background-color: ${user.color}">${user.username.charAt(0).toUpperCase()}</div>
                    <div class="user-info">
                        <div class="username">${user.username}</div>
                    </div>
                `;
                userListContainer.appendChild(userEl);
            });
        }

        // 格式化时间
        function formatTime(timestamp) {
            const date = new Date(timestamp);
            return date.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
        }

        // 生成随机颜色
        function getRandomColor() {
            const colors = [
                '#4361ee', '#3f37c9', '#4895ef', '#4cc9f0', 
                '#7209b7', '#b5179e', '#f72585', '#560bad',
                '#3a0ca3', '#480ca8', '#3a5a40', '#588157'
            ];
            return colors[Math.floor(Math.random() * colors.length)];
        }

        // 设置用户名
        setUsernameButton.addEventListener('click', setUsername);
        usernameInput.addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                setUsername();
            }
        });

        function setUsername() {
            const newUsername = usernameInput.value.trim();
            if (newUsername) {
                username = newUsername;
                userColor = getRandomColor();
                
                // 更新UI
                sidebarUsername.textContent = username;
                userAvatar.textContent = username.charAt(0).toUpperCase();
                userAvatar.style.backgroundColor = userColor;
                
                // 发送用户名到服务器
                if (socket && socket.readyState === WebSocket.OPEN) {
                    socket.send(JSON.stringify({
                        type: 'setUsername',
                        username: newUsername,
                        color: userColor
                    }));
                }
                
                // 关闭弹窗
                usernameModal.style.display = 'none';
                
                // 启用消息输入
                messageInput.disabled = false;
                sendButton.disabled = false;
                messageInput.focus();
                
                addSystemMessage(`您已设置用户名为: ${username}`);
            }
        }

        // 发送消息
        sendButton.addEventListener('click', sendMessage);
        messageInput.addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                sendMessage();
            }
        });

        function sendMessage() {
            const message = messageInput.value.trim();
            if (message && socket && socket.readyState === WebSocket.OPEN) {
                // 先显示自己的消息（乐观更新）
                const tempMessage = {
                    type: 'message',
                    username: username,
                    content: message,
                    timestamp: new Date().toISOString(),
                    color: userColor
                };
                addMessage(tempMessage);
                
                // 发送到服务器
                socket.send(JSON.stringify({
                    type: 'message',
                    content: message
                }));
                
                // 清空输入框
                messageInput.value = '';
            }
        }

        // 初始化
        initWebSocket();
    </script>
</body>
</html>

设计亮点

  1. 现代化UI设计：

    • 使用卡片式布局和圆角元素
    • 精心选择的配色方案
    • 消息气泡设计区分发送和接收消息
    • 用户头像占位符显示用户首字母

  2. 增强的用户体验：

    • 连接状态实时显示
    • 消息发送的乐观更新（先显示再确认）
    • 自动滚动到最新消息
    • 响应式设计适配不同设备

  3. 视觉反馈：

    • 消息出现动画
    • 按钮悬停效果
    • 输入框焦点状态
    • 用户在线状态指示

  4. 功能改进：

    • 自动重连机制
    • 更好的时间显示格式
    • 用户名设置弹窗
    • 在线用户计数

部署说明

  1. 后端仍然使用之前提供的 server.js 代码
  2. 将前端HTML代码保存为 index.html 文件
  3. 启动服务器：node server.js
  4. 在浏览器中打开 index.html

这个设计提供了更加现代和专业的外观，同时保持了所有原始功能并添加了多项用户体验改进。

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