frontend-syntax-css-cascade-layers-scope
Installation
SKILL.md
Frontend Syntax : CSS Cascade Layers and Scope
Cascade-discipline reference. Replaces specificity bidding with predictable order via @layer and DOM-proximity-based component scoping via @scope.
Quick Reference
Baseline status
| Feature | Status | Source |
|---|---|---|
@layer |
Widely Available since March 2022 | MDN : @layer (verified 2026-05-19) |
@scope |
Newly Available since December 2025 | MDN : @scope (verified 2026-05-19) |
revert-layer |
Widely Available | MDN |
Per [[frontend-core-web-standards-baseline]], @scope MUST be gated with @supports at-rule(@scope) or an equivalent feature detection until it reaches Widely Available (around mid-2028).