Allows developers to selectively enable and disable the use of images whose sizes that are much bigger than the containers' through the Feature-Policy HTTP header or the <iframe> 'allow' attribute. This provides more control over images with unnecessarily large intrinsic size, on a per-origin basis. Use this policy to improve image loading performance. The identifier for the feature in policies is 'oversized-images'. By default, 'oversized-images' is allowed in all frames.

Demo

• https://feature-policy-demos.appspot.com/oversized-images.html?on

Documentation

• https://github.com/w3c/webappsec-feature-policy/blob/master/policies/optimized-images.md#oversized-images-policy

Status in Chromium

Blink components: Blink>FeaturePolicy

Implementation status: No active development (tracking bug)

Consensus & Standardization

• Firefox: No signal
• Edge: No signal
• Safari: No signal
• Web Developers: No signals

Owner

• feature-control@chromium.org

Last updated on 2021-05-13