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Miguel Ángel
8cbf4384e1
When a child element inside a sub-composition is selected, the timeline replaces the parent scene clip with the deepest-level siblings. Deselect or selecting outside collapses back. Expanded clips are fully editable — move, resize, delete, and split — addressed by their real DOM id with timeline time rebased onto the sub-comp they live in. Runtime: - New window.__clipTree API: a read-only hierarchical ClipNode tree (id/parentId/children + backing element) so Studio can derive parent/child relationships for inline expansion. Studio: - useExpandedTimelineElements derives the expanded view from selectedElementId + clipParentMap (pure useMemo, no useEffect). Each child rebases onto its immediate sub-comp host (start + sourceFile), so multi-level nesting targets the right file. - NLELayout routes expanded-clip edits through the same handlers top-level clips use, in local coordinates — edits save to the sub-comp source and reflect via reloadPreview (no separate DOM-patch path). This is the canonical update; there is no reactive observer. - findMatchingTimelineElementId resolves sub-comp children with no top-level element to `sourceFile#id`. - Razor tool enabled by default; studio_razor_split analytics event fired on single and split-all. - O(n²) isElementGsapTargeted extracted to gsapTargetCache.ts with a cached Set+WeakSet O(1) lookup.
@hyperframes/studio
Browser-based composition editor UI for Hyperframes. Provides a visual timeline, code editor, and live preview for building video compositions.
Install
npm install @hyperframes/studio
What it does
The studio is a React application with:
- Visual timeline — drag, resize, and arrange elements on tracks
- Code editor — edit HTML and GSAP scripts with CodeMirror (syntax highlighting, autocomplete)
- Live preview — see changes in real time as you edit
- Composition inspector — view and modify element properties
Development
The studio is embedded in the hyperframes preview command. To develop the studio UI itself:
cd packages/studio
bun run dev # Start Vite dev server
bun run build # Build for production
bun run typecheck # Type-check
Tech stack
- React 18/19, Zustand (state management)
- CodeMirror 6 (editor)
- Tailwind CSS (styling)
- Vite (bundler)
- Phosphor Icons
Documentation
Full documentation: hyperframes.heygen.com/packages/studio
Related packages
@hyperframes/core— types and parsers used by the editorhyperframes— CLI that serves the studio viahyperframes preview