Accept-CH-Lifetime
Accept-CH-Lifetime
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Warning: The header was removed from the specification in draft 8.
The Accept-CH-Lifetime header is set by the server to specify the persistence of the client hint headers it specified using Accept-CH, that the client should include in subsequent requests.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
| CORS-safelisted response header | no |
Note: Client Hints are accessible only on secure origins (via TLS). Accept-CH and Accept-CH-Lifetime headers should be persisted for all secure requests to ensure Client Hints are sent reliably.
Syntax
Accept-CH-Lifetime: <age>
Examples
Accept-CH: Viewport-Width Accept-CH-Lifetime: 86400
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
Accept-CH-Lifetime |
67 |
≤79 |
? |
? |
54 |
? |
67 |
67 |
? |
? |
? |
9.0 |
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-CH-Lifetime