"The :has(arg) operator is actually a planned pseudo-class in CSS4, but as of writing no browser supports it. Instead of waiting for browser vendors to provide

"The :has(arg) operator is actually a planned pseudo-class in CSS4, but as of writing no browser supports it. Instead of waiting for browser vendors to provide support, uBO provides support for :has(arg) as a procedural operator." https://github.com/gorhill/uBlock/wiki/Procedural-cosmetic-filters#subjecthasarg https://github.com/gorhill/uBlock/wiki/Procedural-cosmetic-f...