更新时长

src/views/attend-class/component/audio-pay.tsx

@@ -224,9 +224,9 @@ export default defineComponent({
       };
 
       // 获取视频总时长
-      const duration = element.duration;
       let noData = false;
       const onProgress = () => {
+        const duration = element.duration;
         const currentTime = Date.now();
         const buffered = element.buffered;
         let currentBytesLoaded = 0;