autoplay directive controls whether the current document is allowed to autoplay media requested through the
HTMLMediaElement interface. When this policy is enabled and there were no user gestures, the
Promise (en-US) returned by
HTMLMediaElement.play() will reject with a
autoplay attribute on
<video> elements will be ignored.
For more details on autoplay and autoplay blocking, see the article Autoplay guide for media and Web Audio APIs.
Google Chrome 的默认值是
BCD tables only load in the browser