DPR, Width, and Viewport-Width hints enable proactive content negotiation between client and server, enabling automated delivery of optimized assets - e.g. auto-negotiating image DPR resolution, image size, and other optimized assets based on signals such as client's viewport width. For more detail, see: https://docs.google.com/document/d/1SnRhnR_oWQ4Rivb7InJ9a_0T2k9CnuhNcMkd9xtLrKY/edit and https://github.com/igrigorik/http-client-hints#use-cases

Demo

Documentation

Specification

Specification link


Specification being incubated in a Community Group

Status in Chromium

Blink


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

Owner

Last updated on 2020-11-19