Feature-Policy: legacy-image-formats
Feature-Policy: legacy-image-formats
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The HTTP Feature-Policy header legacy-image-formats directive controls whether the current document is allowed to display images in legacy formats.
Syntax
Feature-Policy: legacy-image-formats <allowlist>;
- <allowlist>
-
A list of origins for which the feature is allowed. See
Feature-Policy.
Default policy
Default allow list for legacy-image-formats is 'self'.
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 | |
legacy-image-formats |
No |
No |
No |
No |
No |
No |
No |
No |
No |
No |
No |
No |
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Feature-Policy/legacy-image-formats