Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The Accept-CH-Lifetime header is set by the server to specify the persistence of Accept-CH header value that specifies for which Client Hints headers client should include in subsequent requests.
| Header type | Response header |
|---|---|
| Forbidden header name | ? |
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, DPR Accept-CH-Lifetime: 86400
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Accept-CH-Lifetime | Chrome Full support 67 | Edge ? | Firefox ? | IE ? | Opera Full support 54 | Safari ? | WebView Android Full support 67 | Chrome Android Full support 67 | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support Yes |
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.