@scope

Even if you nest details elements, you can ensure only one level of them is open at a time, making a menu you can drill down (and up!) from.

There is a way to declare a scope on a specific selector, a specific selector *down to* another selector, or with no selector at all (which scopes to its parent in the DOM).

We’ve got @scope in CSS now, and it’s got it’s uses. But the concept of scope in CSS is a wider idea.

There is an already-classic @scope demo about theme colors. Let’s recap that and then I’ll show how it relates to any situation with modifier classes. (The @scope rule is a newish feature in CSS that is everywhere-but-Firefox, but is in Interop 2025, so shouldn’t be too long to be decently usable.) There are lots of […]

There is an entirely web-platform way of injecting scoped CSS styles into the DOM. It’s requires zero tooling. Will we see it being used more, once Firebox support is there?