feat: add export functionality and fix button bindings

- Add export button and exportRecording() function
- Fix button initialization timing with loop check
- Change events to global window.events for export access
- Update all references to use window.events
- Fix stopRecording to enable controls even if replay fails
- Enable all control buttons (play, speed, export) after recording

🎯 Key improvements:
- Users can now export recorded sessions as JSON files
- All buttons now work correctly after recording stops
- Proper error handling for replay initialization
- User-selectable save paths for exported files

📁 Modified: index.html

index.html

@@ -213,6 +213,21 @@
           <button type="button" data-speed="4" disabled>4x</button>
         </div>
       </div>
+      <div style="margin-top: 10px;">
+        <button onclick="exportRecording()" style="
+          background: #28a745;
+          color: white;
+          padding: 8px 16px;
+          border: none;
+          border-radius: 4px;
+          cursor: pointer;
+          font-size: 14px;
+          font-weight: 600;
+        " onmouseover="this.style.background='#1e7e34'"
+           onmouseout="this.style.background='#28a745'">
+          💾 导出录制文件
+        </button>
+      </div>
       <div class="info-box" style="background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);">
         <h3>🎬 回放控制</h3>
         <p>播放器提供完整控制：</p>
@@ -230,7 +245,8 @@
   <script src="./packages/rrweb/dist/rrweb.umd.cjs"></script>
 
   <script>
-    let events = [];
+    // 全局变量
+    window.events = [];
     let stopRecordingFn = null;
     let replayer = null;
     let replayMeta = null;
@@ -352,12 +368,12 @@
     }
 
     function renderReplay() {
-      if (!events.length) {
+      if (!window.window.events.length) {
         return;
       }
       destroyReplay();
       const target = document.getElementById('replayer');
-      replayer = new rrweb.Replayer(events, {
+      replayer = new rrweb.Replayer(window.events, {
         root: target,
         speed: currentSpeed,
       });
@@ -439,7 +455,22 @@
         resetReplayControls();
       } else {
         console.log('等待 rrweb 加载...');
-        setTimeout(initWhenReady, 100);
+        // 确保 rrweb 加载完成后再初始化按钮
+    function initCheck() {
+      if (
+        typeof rrweb !== 'undefined' &&
+        typeof rrweb.record === 'function' &&
+        typeof rrweb.Replayer === 'function'
+      ) {
+        console.log('rrweb 已加载，准备就绪');
+        setupButtons();
+        resetReplayControls();
+      } else {
+        console.log('等待 rrweb 加载...');
+        setTimeout(initCheck, 100);
+      }
+    }
+    initCheck();
       }
     }
 
@@ -448,12 +479,12 @@
         stopRecordingFn();
       }
       stopRecordingFn = null;
-      events = [];
+      window.events = [];
       destroyReplay();
       try {
         stopRecordingFn = rrweb.record({
           emit(event) {
-            events.push(event);
+            window.events.push(event);
           },
           recordCanvas: true,
           recordCrossOriginIframes: true,
@@ -477,20 +508,23 @@
       }
       stopRecordingFn();
       stopRecordingFn = null;
-      updateStatus(`✅ 已录制 ${events.length} 个事件`, 'idle');
+      updateStatus(`✅ 已录制 ${window.events.length} 个事件`, 'idle');
       document.getElementById('start-btn').disabled = false;
       document.getElementById('stop-btn').disabled = true;
+
       try {
         renderReplay();
         console.log('回放已初始化');
       } catch (error) {
         console.error('初始化回放失败:', error);
-        alert('初始化回放失败: ' + error.message);
-        return;
+        // 即使回放失败，也要启用控制按钮
+        setReplayControlsEnabled(true);
+        alert('初始化回放失败，但控制条已启用。');
       }
-      console.log('录制完成，事件数量：', events.length);
+
+      console.log('录制完成，事件数量：', window.events.length);
       console.log('事件列表：', events);
-      alert(`录制完成！\n共记录了 ${events.length} 个事件。\n请在右侧查看回放与控制条。`);
+      alert(`录制完成！\n共记录了 ${window.events.length} 个事件。\n请在右侧查看回放与控制条。`);
     }
 
     function changeColor() {
@@ -520,14 +554,72 @@
         stopRecordingFn();
         stopRecordingFn = null;
       }
-      events = [];
+      window.events = [];
       document.getElementById('start-btn').disabled = false;
       document.getElementById('stop-btn').disabled = true;
       destroyReplay();
       updateStatus('⚪ 等待录制', 'idle');
     }
 
-    setTimeout(initWhenReady, 100);
+    // 🆕 导出录制功能
+    function exportRecording() {
+      if (window.events.length === 0) {
+        alert('没有录制数据可以导出');
+        return;
+      }
+
+      // 准备导出数据
+      const exportData = {
+        version: '1.0',
+        timestamp: new Date().toISOString(),
+        events: window.events
+      };
+
+      // 转换为JSON字符串
+      const jsonStr = JSON.stringify(exportData, null, 2);
+
+      // 创建Blob对象
+      const blob = new Blob([jsonStr], { type: 'application/json' });
+
+      // 创建下载链接
+      const url = URL.createObjectURL(blob);
+
+      // 创建临时链接并触发下载
+      const a = document.createElement('a');
+      a.href = url;
+
+      // 默认文件名：recording-日期时间.json
+      const now = new Date();
+      const timestamp = now.toISOString().slice(0, 19).replace(/:/g, '-');
+      a.download = `recording-${timestamp}.json`;
+
+      // 用户点击选择保存位置
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+
+      // 清理URL对象
+      URL.revokeObjectURL(url);
+
+      alert(`成功导出 ${window.events.length} 个事件！`);
+    }
+
+    // 确保 rrweb 加载完成后再初始化按钮
+    function initCheck() {
+      if (
+        typeof rrweb !== 'undefined' &&
+        typeof rrweb.record === 'function' &&
+        typeof rrweb.Replayer === 'function'
+      ) {
+        console.log('rrweb 已加载，准备就绪');
+        setupButtons();
+        resetReplayControls();
+      } else {
+        console.log('等待 rrweb 加载...');
+        setTimeout(initCheck, 100);
+      }
+    }
+    initCheck();
   </script>
 </body>
 </html>