| Specification | Last Update |
|---|---|
| Box Tree API Level 1 | 2026-01-08 |
| CSS Animation Worklet API | 2025-12-28 |
| CSS Layout API Level 1 | 2025-12-28 |
| CSS Painting API Level 1 | 2024-08-25 |
| CSS Parser API | 2017-11-09 |
| CSS Properties and Values API Level 1 | 2026-01-09 |
| CSS Typed OM Level 1 (Current Work) | 2025-12-28 |
| CSS Typed OM Level 2 | 2025-12-28 |
| Font Metrics API Level 1 | 2026-01-12 |
| Worklets Level 1 | 2020-10-16 |