prefers-reduced-data

[lukewarlow]

WebKittens

No response

Title of the spec

Media Queries, Level 5

URL to the spec

https://www.w3.org/TR/mediaqueries-5/#prefers-reduced-data

URL to the spec's repository

https://github.com/w3c/csswg-drafts

Issue Tracker URL

No response

Explainer URL

No response

TAG Design Review URL

w3ctag/design-reviews#705

Mozilla standards-positions issue URL

mozilla/standards-positions#393

WebKit Bugzilla URL

https://bugs.webkit.org/show_bug.cgi?id=225807

Radar URL

rdar://problem/78310621

Description

A new media query to allow CSS to detect if the user has a preference for being served alternate content that uses less data for the page to be rendered.

[annevk]

The W3C TAG review essentially dismissed this solution and asked for something else: w3ctag/design-reviews#705 (comment). Do we know if their concerns are addressed?

This is also another bit that could be used towards fingerprinting and in the extreme could be used to exploit end users in some way, similar to what happened with the Battery Status API.