统一处理null和undefined

wangzhibo

2021-11-02 8a4b8e1f0fc75d144ef4e48f0d0f9554502b4bf6

1
<video id="qyVideo" src="" controls="controls" style="width: 100%; height: 100%; background-color: #000000" autoplay="autoplay">视频下载中……</video>