![]() ![]() If not, then the user agent will retry the request rather than render the page. User agents receiving a response with Critical-CH must check if the indicated critical headers were sent in the original request. Permissions-Policy: xr-spatial-tracking ExperimentalĪ critical client hint is one where applying the response may significantly change the rendered page, potentially in a way that is jarring or will affect usability, and therefore which must be applied before the content is rendered.įor example, Sec-CH-Prefers-Reduced-Motion is commonly treated as a critical hint, because it might markedly affect the behavior of animations, and because a user who chooses this preference needs it to be set.Ī server can use the Critical-CH response header along with Accept-CH to specify that an accepted client hint is also a critical client hint (a header in Critical-CH must also appear in Accept-CH).Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental.Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: gyroscope Experimental.Permissions-Policy: gamepad Experimental.Permissions-Policy: execution-while-out-of-viewport Experimental.Permissions-Policy: execution-while-not-rendered Experimental.Permissions-Policy: encrypted-media Experimental.Permissions-Policy: document-domain Experimental.Permissions-Policy: battery Experimental.Permissions-Policy: autoplay Experimental.Permissions-Policy: ambient-light-sensor Experimental.Permissions-Policy: accelerometer Experimental.Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed.Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'.Reason: CORS request external redirect not allowed.Reason: CORS preflight channel did not succeed.Reason: CORS header 'Origin' cannot be added.Reason: CORS header 'Access-Control-Allow-Origin' missing.Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.CSP: require-trusted-types-for Experimental. ![]() CSP: plugin-types Non-standard Deprecated.CSP: block-all-mixed-content Deprecated.Sec-CH-UA-Platform-Version Experimental.Sec-CH-UA-Full-Version-List Experimental.Sec-CH-Prefers-Reduced-Motion Experimental.Large-Allocation Non-standard Deprecated.Accept-CH-Lifetime Non-standard Deprecated. ![]()
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