Accept-CH-Lifetime

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

服务器设置Accept-CH-Lifetime标头以指定Accept-CH标头值的持久性,该值指定客户端应在后续请求中包括哪些Client Hints标头。

Header type Response header
Forbidden header name ?

注意: Client Hints只能在安全源(通过TLS)上访问。所有安全的请求都应该持久化Accept-CH和Accept-CH-Lifetime头,以确保Client Hints可靠地发送。

语法

Accept-CH-Lifetime: <age>

示例

Accept-CH: Viewport-Width, DPR
Accept-CH-Lifetime: 86400

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Accept-CH-Lifetime
Experimental
Chrome Full support 67Edge Full support ≤79Firefox ? IE ? Opera Full support 54Safari ? WebView Android Full support 67Chrome Android Full support 67Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android Full support 9.0

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

参见