PictureInPictureEvent：pictureInPictureWindow 属性
PictureInPictureEvent 接口的 pictureInPictureWindow 只读属性返回与事件相关的 PictureInPictureWindow。
值
规范
| Specification |
|---|
| Picture-in-Picture # dom-pictureinpictureevent-pictureinpicturewindow |
浏览器兼容性
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