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

BCD tables only load in the browser

See also