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<!--
Claude Code Web — Frontend
前端页面：单文件 HTML，无需构建，直接由 Express 提供服务
Features / 功能:
- claude.ai-inspired design / 参考 claude.ai 的暖色调设计
- Dark mode with localStorage / 深色模式（持久化）
- SSE streaming display / SSE 流式消息展示
- File upload (click + drag & drop) / 文件上传（点击 + 拖拽）
- File download links in messages / 消息中的文件下载链接
- Mobile responsive / 移动端适配
- Simple Markdown rendering / 简易 Markdown 渲染
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Claude Code Web</title>
<style>
/* ═══ CSS Variables / CSS 变量 ═══
Light theme by default, .dark class overrides
默认亮色主题，.dark 类覆盖为暗色 */
:root {
--bg: #f5f1eb;
--bg2: #eae5dc;
--surface: #ffffff;
--border: #d4cfc7;
--border-light: #e8e4dc;
--accent: #c96442;
--accent-hover: #b5573a;
--text: #2d2b28;
--text2: #6b6560;
--text3: #9b9590;
--user-bg: #f0ece6;
--code-bg: #2d2b28;
--radius: 16px;
--radius-sm: 10px;
--max-w: 720px;
--shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.dark {
--bg: #1a1816;
--bg2: #242220;
--surface: #2d2b28;
--border: #3d3a36;
--border-light: #353230;
--text: #e8e4dc;
--text2: #9b9590;
--text3: #6b6560;
--user-bg: #353230;
--code-bg: #1a1816;
--shadow: 0 1px 3px rgba(0,0,0,0.2);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
font-family: "Söhne", -apple-system, "Segoe UI", Roboto, "Noto Sans SC", "Helvetica Neue", sans-serif;
background: var(--bg);
color: var(--text);
height: 100dvh;
display: flex;
flex-direction: column;
transition: background .3s, color .3s;
}
/* ═══ Top Bar ═══ */
.topbar {
display: flex;
align-items: center;
padding: 10px 16px;
background: var(--bg);
border-bottom: 1px solid var(--border-light);
gap: 10px;
flex-shrink: 0;
z-index: 10;
}
.topbar .logo {
width: 28px; height: 28px;
background: var(--accent);
border-radius: 8px;
display: flex; align-items: center; justify-content: center;
color: #fff; font-weight: 700; font-size: 14px;
flex-shrink: 0;
}
.topbar .title {
font-size: 15px; font-weight: 600; flex: 1;
white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar .session-id {
font-size: 11px; color: var(--text3); font-family: monospace;
max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tb-btn {
background: none; border: 1px solid var(--border);
color: var(--text2); border-radius: var(--radius-sm);
padding: 5px 12px; font-size: 13px; cursor: pointer;
transition: all .15s; display: flex; align-items: center; gap: 5px;
}
.tb-btn:hover { background: var(--bg2); color: var(--text); }
.tb-btn svg { width: 14px; height: 14px; }
/* ═══ Messages Area ═══ */
.messages {
flex: 1;
overflow-y: auto;
padding: 24px 16px;
scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
/* ═══ Message ═══ */
.msg {
max-width: var(--max-w);
margin: 0 auto 20px;
display: flex;
gap: 12px;
align-items: flex-start;
}
.msg .avatar {
width: 28px; height: 28px;
border-radius: 8px;
flex-shrink: 0;
display: flex; align-items: center; justify-content: center;
font-size: 13px; font-weight: 600;
margin-top: 2px;
}
.msg.user .avatar {
background: var(--accent);
color: #fff;
}
.msg.ai .avatar {
background: var(--bg2);
border: 1px solid var(--border);
color: var(--accent);
}
.msg .bubble {
flex: 1;
min-width: 0;
}
.msg .name {
font-size: 13px;
font-weight: 600;
margin-bottom: 4px;
color: var(--text);
}
.msg .body {
font-size: 14.5px;
line-height: 1.7;
word-break: break-word;
white-space: pre-wrap;
color: var(--text);
}
/* Code */
.msg .body code {
background: var(--user-bg);
padding: 1px 5px;
border-radius: 4px;
font-size: 13px;
font-family: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, monospace;
}
.msg .body pre {
background: var(--code-bg);
color: #e8e4dc;
padding: 14px 16px;
border-radius: var(--radius-sm);
overflow-x: auto;
margin: 8px 0;
font-size: 13px;
line-height: 1.5;
}
.msg .body pre code {
background: none; padding: 0; color: inherit;
}
/* Tool tag */
.tool-tag {
display: inline-flex; align-items: center; gap: 4px;
background: var(--bg2);
border: 1px solid var(--border-light);
padding: 2px 10px;
border-radius: 6px;
font-size: 12px;
color: var(--text2);
margin: 4px 0;
}
.tool-tag::before { content: "⚙"; font-size: 11px; }
/* ═══ Typing Indicator ═══ */
.typing-wrap {
display: none;
max-width: var(--max-w);
margin: 0 auto 20px;
}
.typing-wrap.on { display: flex; gap: 12px; align-items: flex-start; }
.typing-wrap .avatar {
width: 28px; height: 28px;
border-radius: 8px;
background: var(--bg2);
border: 1px solid var(--border);
display: flex; align-items: center; justify-content: center;
color: var(--accent);
font-size: 13px; font-weight: 600;
flex-shrink: 0;
}
.typing-dots {
display: flex; gap: 4px; padding: 12px 0;
}
.typing-dots span {
width: 6px; height: 6px; border-radius: 50%;
background: var(--text3);
animation: bounce .9s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: .15s; }
.typing-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes bounce {
0%, 60%, 100% { transform: translateY(0); }
30% { transform: translateY(-5px); }
}
/* ═══ Welcome (empty state) ═══ */
.welcome {
max-width: var(--max-w);
margin: 60px auto;
text-align: center;
padding: 0 20px;
}
.welcome .w-logo {
width: 52px; height: 52px;
background: var(--accent);
border-radius: 14px;
display: inline-flex; align-items: center; justify-content: center;
color: #fff; font-size: 24px; font-weight: 700;
margin-bottom: 16px;
}
.welcome h2 {
font-size: 22px; font-weight: 600; margin-bottom: 8px;
}
.welcome p {
font-size: 14px; color: var(--text2); line-height: 1.6;
}
/* ═══ Input Area ═══ */
.input-area {
flex-shrink: 0;
padding: 12px 16px 16px;
background: var(--bg);
}
.input-box {
max-width: var(--max-w);
margin: 0 auto;
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
box-shadow: var(--shadow);
padding: 10px 12px;
display: flex;
flex-direction: column;
transition: border-color .2s;
}
.input-box:focus-within { border-color: var(--accent); }
.input-box textarea {
width: 100%;
background: none;
color: var(--text);
border: none;
font-size: 14.5px;
font-family: inherit;
line-height: 1.55;
resize: none;
min-height: 24px;
max-height: 160px;
outline: none;
padding: 0;
}
.input-box textarea::placeholder { color: var(--text3); }
.input-actions {
display: flex;
align-items: center;
justify-content: flex-end;
gap: 6px;
margin-top: 8px;
}
.send-btn {
width: 34px; height: 34px;
border-radius: 10px;
border: none;
background: var(--accent);
color: #fff;
cursor: pointer;
display: flex; align-items: center; justify-content: center;
transition: background .15s, opacity .15s;
}
.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled { opacity: .3; cursor: not-allowed; }
.send-btn svg { width: 18px; height: 18px; }
.cancel-btn {
display: none;
height: 34px;
border-radius: 10px;
border: 1px solid var(--border);
background: var(--surface);
color: var(--text2);
cursor: pointer;
padding: 0 14px;
font-size: 13px;
transition: all .15s;
}
.cancel-btn:hover { background: var(--bg2); }
/* ═══ File Attach ═══ */
.attach-btn {
width: 34px; height: 34px;
border-radius: 10px;
border: 1px solid var(--border);
background: none;
color: var(--text2);
cursor: pointer;
display: flex; align-items: center; justify-content: center;
transition: all .15s;
flex-shrink: 0;
}
.attach-btn:hover { background: var(--bg2); color: var(--text); }
.attach-btn svg { width: 16px; height: 16px; }
.file-chips {
display: flex;
flex-wrap: wrap;
gap: 6px;
margin-bottom: 6px;
}
.file-chips:empty { display: none; margin: 0; }
.file-chip {
display: inline-flex;
align-items: center;
gap: 5px;
background: var(--bg2);
border: 1px solid var(--border-light);
border-radius: 8px;
padding: 4px 10px;
font-size: 12px;
color: var(--text2);
max-width: 200px;
}
.file-chip .fc-name {
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.file-chip .fc-size { color: var(--text3); flex-shrink: 0; }
.file-chip .fc-remove {
cursor: pointer;
color: var(--text3);
font-size: 14px;
line-height: 1;
flex-shrink: 0;
}
.file-chip .fc-remove:hover { color: var(--accent); }
.drag-overlay {
display: none;
position: fixed;
inset: 0;
background: rgba(201,100,66,0.08);
border: 2px dashed var(--accent);
border-radius: var(--radius);
z-index: 100;
align-items: center;
justify-content: center;
pointer-events: none;
}
.drag-overlay.on { display: flex; }
.drag-overlay span {
background: var(--surface);
padding: 12px 24px;
border-radius: var(--radius);
font-size: 15px;
color: var(--accent);
font-weight: 600;
box-shadow: var(--shadow);
}
/* File link in messages */
.file-link {
display: inline-flex;
align-items: center;
gap: 5px;
background: var(--bg2);
border: 1px solid var(--border-light);
padding: 4px 12px;
border-radius: 8px;
font-size: 13px;
color: var(--accent);
text-decoration: none;
margin: 4px 0;
transition: all .15s;
}
.file-link:hover { background: var(--border-light); }
.file-link::before { content: "📎"; font-size: 12px; }
.input-hint {
max-width: var(--max-w);
margin: 8px auto 0;
font-size: 11px;
color: var(--text3);
text-align: center;
}
/* ═══ Mobile ═══ */
@media (max-width: 640px) {
.topbar .session-id { display: none; }
.msg { gap: 8px; }
.msg .avatar { width: 24px; height: 24px; font-size: 11px; border-radius: 6px; }
.welcome { margin: 30px auto; }
.welcome h2 { font-size: 18px; }
}
</style>
</head>
<body>
<!-- Top Bar -->
<div class="topbar">
<div class="logo">C</div>
<span class="title">Claude</span>
<span class="session-id" id="sidLabel"></span>
<button class="tb-btn" id="newBtn" title="新对话">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
新对话
</button>
<button class="tb-btn" id="themeBtn" title="切换主题">
<svg id="themeIcon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg>
</button>
</div>
<!-- Messages -->
<div class="messages" id="msgs">
<div class="welcome" id="welcome">
<div class="w-logo">C</div>
<h2>有什么可以帮你的？</h2>
<p>通过 Claude Code CLI 运行，支持连续对话、工具调用、代码执行。</p>
</div>
</div>
<!-- Typing Indicator -->
<div class="typing-wrap" id="typing">
<div class="avatar">C</div>
<div class="typing-dots"><span></span><span></span><span></span></div>
</div>
<!-- Input -->
<div class="input-area">
<div class="input-box" id="inputBox">
<div class="file-chips" id="fileChips"></div>
<textarea id="input" placeholder="给 Claude 发送消息…" rows="1"></textarea>
<div class="input-actions">
<button class="attach-btn" id="attachBtn" title="附件">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21.44 11.05l-9.19 9.19a6 6 0 01-8.49-8.49l9.19-9.19a4 4 0 015.66 5.66l-9.2 9.19a2 2 0 01-2.83-2.83l8.49-8.48"/></svg>
</button>
<button class="cancel-btn" id="cancelBtn">停止生成</button>
<button class="send-btn" id="sendBtn" title="发送">
<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><line x1="22" y1="2" x2="11" y2="13"/><polygon points="22 2 15 22 11 13 2 9 22 2"/></svg>
</button>
</div>
<input type="file" id="fileInput" multiple hidden>
</div>
<div class="drag-overlay" id="dragOverlay"><span>拖放文件到这里</span></div>
<div class="input-hint">Claude Code CLI · Enter 发送 · Shift+Enter 换行 · 支持拖拽或点击📎上传文件</div>
</div>
<script>
// ═══════════════════════════════════════════════════════
// Claude Code Web — Frontend JavaScript
// 前端 JS：处理消息发送、SSE 流式接收、文件上传、主题切换
// ═══════════════════════════════════════════════════════
// DOM references / DOM 元素引用
const $ = id => document.getElementById(id);
const msgsEl = $('msgs'); // Message container / 消息容器
const typingEl = $('typing'); // Typing indicator / 正在输入指示器
const inputEl = $('input'); // Text input / 文本输入框
const sendBtn = $('sendBtn'); // Send button / 发送按钮
const cancelBtn = $('cancelBtn'); // Cancel button / 取消按钮
const newBtn = $('newBtn'); // New chat button / 新对话按钮
const sidLabel = $('sidLabel'); // Session ID display / 会话 ID 显示
const welcomeEl = $('welcome'); // Welcome screen / 欢迎页面
const themeBtn = $('themeBtn'); // Theme toggle / 主题切换按钮
const attachBtn = $('attachBtn'); // File attach button / 文件附件按钮
const fileInput = $('fileInput'); // Hidden file input / 隐藏的文件输入
const fileChips = $('fileChips'); // Attached file chips / 已附加文件标签
const dragOverlay = $('dragOverlay');// Drag & drop overlay / 拖拽覆盖层
// State / 状态
let sessionId = null; // Current session ID for multi-turn / 当前会话 ID（用于连续对话）
let currentReq = null; // Current request ID for cancellation / 当前请求 ID（用于取消）
let busy = false; // Whether a request is in progress / 是否正在请求中
let attachedFiles = []; // Uploaded files pending send / 待发送的已上传文件 [{id, name, size, path}]
// Auth token from URL query / 从 URL 参数获取认证令牌
const token = new URLSearchParams(location.search).get('token') || '';
// ── Theme toggle / 主题切换 ──
const savedTheme = localStorage.getItem('theme');
if (savedTheme === 'dark' || (!savedTheme && matchMedia('(prefers-color-scheme:dark)').matches)) {
document.body.classList.add('dark');
}
themeBtn.addEventListener('click', () => {
document.body.classList.toggle('dark');
localStorage.setItem('theme', document.body.classList.contains('dark') ? 'dark' : 'light');
});
// ── New Chat / 新对话 ──
// Resets session, clears messages, shows welcome screen
// 重置会话、清空消息、显示欢迎页
newBtn.addEventListener('click', () => {
sessionId = null;
sidLabel.textContent = '';
msgsEl.innerHTML = '';
msgsEl.appendChild(welcomeEl);
welcomeEl.style.display = '';
clearAttached();
});
// ═══════════════════════════════════════════════════════
// File Upload / 文件上传
// Files are uploaded to /api/upload first, then attached to chat message
// 文件先上传到 /api/upload，然后随聊天消息一起发送
// ═══════════════════════════════════════════════════════
// Format file size for display / 格式化文件大小
function formatSize(bytes) {
if (bytes < 1024) return bytes + ' B';
if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
}
function renderChips() {
fileChips.innerHTML = '';
attachedFiles.forEach((f, i) => {
const chip = document.createElement('div');
chip.className = 'file-chip';
chip.innerHTML = `<span class="fc-name">${f.name}</span><span class="fc-size">${formatSize(f.size)}</span><span class="fc-remove" data-i="${i}">×</span>`;
fileChips.appendChild(chip);
});
}
function clearAttached() {
attachedFiles = [];
fileChips.innerHTML = '';
fileInput.value = '';
}
fileChips.addEventListener('click', e => {
const rm = e.target.closest('.fc-remove');
if (rm) {
attachedFiles.splice(Number(rm.dataset.i), 1);
renderChips();
}
});
async function uploadFiles(fileList) {
if (!fileList.length) return;
const fd = new FormData();
for (const f of fileList) fd.append('files', f);
try {
const headers = {};
if (token) headers['X-Auth-Token'] = token;
const resp = await fetch('/api/upload' + (token ? '?token=' + token : ''), {
method: 'POST', headers, body: fd,
});
const data = await resp.json();
if (data.ok && data.files) {
attachedFiles.push(...data.files);
renderChips();
} else {
alert('上传失败: ' + (data.error || '未知错误'));
}
} catch (err) {
alert('上传失败: ' + err.message);
}
}
attachBtn.addEventListener('click', () => fileInput.click());
fileInput.addEventListener('change', () => {
if (fileInput.files.length) uploadFiles(fileInput.files);
fileInput.value = '';
});
// ── Drag & Drop / 拖拽上传 ──
// Shows overlay when dragging files over the page / 拖拽文件到页面时显示覆盖层
let dragCounter = 0;
document.addEventListener('dragenter', e => { e.preventDefault(); dragCounter++; dragOverlay.classList.add('on'); });
document.addEventListener('dragleave', e => { e.preventDefault(); dragCounter--; if (dragCounter <= 0) { dragCounter = 0; dragOverlay.classList.remove('on'); } });
document.addEventListener('dragover', e => e.preventDefault());
document.addEventListener('drop', e => {
e.preventDefault();
dragCounter = 0;
dragOverlay.classList.remove('on');
if (e.dataTransfer.files.length) uploadFiles(e.dataTransfer.files);
});
// ── Add Message to UI / 添加消息到界面 ──
// Creates a message bubble with avatar / 创建带头像的消息气泡
function addMsg(role, content) {
welcomeEl.style.display = 'none';
const isUser = role === 'user';
const div = document.createElement('div');
div.className = `msg ${isUser ? 'user' : 'ai'}`;
div.innerHTML = `
<div class="avatar">${isUser ? 'Y' : 'C'}</div>
<div class="bubble">
<div class="name">${isUser ? 'You' : 'Claude'}</div>
<div class="body"></div>
</div>`;
div.querySelector('.body').innerHTML = content;
msgsEl.appendChild(div);
msgsEl.scrollTop = msgsEl.scrollHeight;
return div;
}
// ── Simple Markdown renderer / 简易 Markdown 渲染 ──
// Supports: code blocks, inline code, bold, italic, file download links
// 支持：代码块、行内代码、粗体、斜体、文件下载链接
function md(t) {
let html = t
.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>')
.replace(/```(\w*)\n([\s\S]*?)```/g, '<pre><code>$2</code></pre>')
.replace(/`([^`]+)`/g, '<code>$1</code>')
.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>')
.replace(/\*(.+?)\*/g, '<em>$1</em>');
// 渲染文件下载链接: [下载 filename](/api/files/xxx)
html = html.replace(/\[([^\]]*)\]\((\/api\/files\/[^)]+)\)/g,
'<a class="file-link" href="$2" target="_blank" download>$1</a>');
return html;
}
// ═══════════════════════════════════════════════════════
// Send message / 发送消息
// 1. Upload attached files info to /api/chat
// 2. Read SSE stream and update UI in real-time
// 3. Save session ID for multi-turn conversation
//
// 流程：发消息 → 读 SSE 流 → 实时更新界面 → 保存会话 ID
// ═══════════════════════════════════════════════════════
async function send() {
const text = inputEl.value.trim();
if (!text || busy) return;
inputEl.value = '';
inputEl.style.height = 'auto';
// 显示用户消息（含附件标签）
let userHtml = md(text);
if (attachedFiles.length) {
const chipHtml = attachedFiles.map(f => `<span class="file-chip"><span class="fc-name">${f.name}</span><span class="fc-size">${formatSize(f.size)}</span></span>`).join('');
userHtml = `<div style="margin-bottom:6px">${chipHtml}</div>` + userHtml;
}
addMsg('user', userHtml);
// 准备文件列表
const filesToSend = attachedFiles.length ? attachedFiles.map(f => ({ id: f.id, path: f.path })) : undefined;
clearAttached();
setBusy(true);
const aiDiv = addMsg('ai', '');
const bodyEl = aiDiv.querySelector('.body');
let full = '';
try {
const headers = { 'Content-Type': 'application/json' };
if (token) headers['X-Auth-Token'] = token;
const resp = await fetch('/api/chat', {
method: 'POST', headers,
body: JSON.stringify({ message: text, sessionId, files: filesToSend }),
});
const reader = resp.body.getReader();
const dec = new TextDecoder();
let buf = '';
while (true) {
const { done, value } = await reader.read();
if (done) break;
buf += dec.decode(value, { stream: true });
const lines = buf.split('\n');
buf = lines.pop() || '';
for (const line of lines) {
if (!line.startsWith('data: ')) continue;
try {
const e = JSON.parse(line.slice(6));
if (e.type === 'meta') currentReq = e.reqId;
else if (e.type === 'text') { full += e.text; bodyEl.innerHTML = md(full); msgsEl.scrollTop = msgsEl.scrollHeight; }
else if (e.type === 'tool') { full += `\n`; bodyEl.innerHTML = md(full) + `<div class="tool-tag">${e.tool}</div>`; }
else if (e.type === 'session') { sessionId = e.sessionId; sidLabel.textContent = e.sessionId.slice(0,8) + '…'; }
else if (e.type === 'error') { full += `\n${e.error}`; bodyEl.innerHTML = md(full); }
} catch {}
}
}
} catch (err) {
bodyEl.innerHTML = `<span style="color:var(--accent)">连接失败: ${err.message}</span>`;
} finally {
setBusy(false);
if (!full.trim()) bodyEl.innerHTML = '<span style="color:var(--text3)">无响应</span>';
}
}
function setBusy(v) {
busy = v;
sendBtn.disabled = v;
cancelBtn.style.display = v ? 'inline-flex' : 'none';
typingEl.classList.toggle('on', v);
if (!v) currentReq = null;
}
// ── Cancel ongoing request / 取消正在进行的请求 ──
cancelBtn.addEventListener('click', async () => {
if (!currentReq) return;
const h = { 'Content-Type': 'application/json' };
if (token) h['X-Auth-Token'] = token;
fetch('/api/cancel', { method: 'POST', headers: h, body: JSON.stringify({ reqId: currentReq }) });
});
// ── Event bindings / 事件绑定 ──
// Enter to send, Shift+Enter for newline, auto-resize textarea
// Enter 发送，Shift+Enter 换行，自动调整输入框高度
sendBtn.addEventListener('click', send);
inputEl.addEventListener('keydown', e => {
if (e.key === 'Enter' && !e.shiftKey && !e.isComposing) { e.preventDefault(); send(); }
});
inputEl.addEventListener('input', () => {
inputEl.style.height = 'auto';
inputEl.style.height = Math.min(inputEl.scrollHeight, 160) + 'px';
});
</script>
</body>
</html>