删除
moveRight
moveDown
moveUp
resize
全屏
load()
play()
pause()
currentTime+=10
currentTime-=10
currentTime=50
playbackRate++
playbackRate--
playbackRate+=0.1
playbackRate-=0.1
volume+=0.1
volume-=0.1
muted=true
muted=false
显示属性
隐藏属性
Media Events
Tracks
Audio
Video
Text
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Media Properties
canPlayType