How Declarative Custom Elements (DCE) Could Improve Web Components

Declarative Custom Elements (DCE) are being explored as a solution to persistent Web Components challenges, including JavaScript dependency for presentational components, Flash of Unstyled Content (FOUC), and complex SSR implementations. While Declarative Shadow DOM (DSD) was introduced to address some pain points, it suffers from template duplication across component instances and library-specific hydration requirements. DCE aims to further simplify component definitions by eliminating these trade-offs.