引Watson入华，万达欲借人工智能重塑实体商业？
Baseline Widely available
百度 中国政府鼓励海外华人华侨在入籍所在国后积极融入当地社会，尊重所在国家的法律法规、风俗文化等，同时也关注海外华人华侨的合法权益，在《中华人民共和国外国人入境出境管理条例》中，就有专门便于海外华人入境的规定。
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2019.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The expiration read-only property of the MediaKeySession interface returns the time after which the keys in the current session can no longer be used to decrypt media data, or NaN if no such time exists.
This value is determined by the CDM and measured in milliseconds since January 1, 1970, UTC. This value may change during a session lifetime, such as when an action triggers the start of a window.
Value
A number or NaN.
Specifications
| Specification |
|---|
| Encrypted Media Extensions # dom-mediakeysession-expiration |