The Media Queries Level 4 Interaction Media Features — pointer, hover, any-pointer and any-hover — are meant to allow sites to implement different styles and functionality (either CSS-specific interactivity like :hover, or JavaScript behaviors, when queried using window.matchMedia), depending on the particular characteristics of a user’s input device.| CSS-Tricks
These (still) aren't the SCs you're looking for …| patrickhlauke.github.io
identifier| w3c.github.io
Session timeouts are designed to protect privacy and security, but if they’re implemented incorrectly, they can prevent people from completing tasks on a website.| TetraLogical
Animation and movement can add to the visual appeal of content, but poorly designed animations can cause problems for many people unless it is implemented correctly.| TetraLogical
Accessibility resources free online from the international standards organization: W3C Web Accessibility Initiative (WAI).| Web Accessibility Initiative (WAI)