Picture Element Proposal
This proposal has been submitted to the HTML WG for consideration as part of HTML.next and the WHATWG for their ongoing consideration.This proposal addresses the need to optimize the users’ experience of images across an increasingly diverse range of displays. It addresses this issues through a markup-based means of delivering alternate content image sources, based on device capabilities.This proposal is based on Florian Rivoal’s original proposal to the WHATWG.
An excerpt from Picture Element Proposal