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Miguel Angel Simon Sierra
4e4776d6ca
Opening a project ran up to three whole-document scans per clip. The manifest identifies clips with `stableClipId` (`el.id` OR `data-hf-id`) while the studio lookup asked `getElementById`, which never matches the second half — so every hf-id clip missed the fast path and fell through to `getTimelineDomNodes`, a fresh `[data-start]` scan whose `isTimelineIgnoredElement` filter walks `closest()` over every node. At 3,000 clips that is 37M ancestor walks rejecting nothing. Build one index per `processTimelineMessage` pass and thread it to all three emitters: node resolution, the source-scoped selector-occurrence index, and the composition branch that re-resolves a host when the manifest carries no `compositionSrc`. The index is derived from a single document walk and is discarded with the pass, so an edit that mutates the preview DOM cannot resolve against stale nodes. Identity is unchanged. `usedNodes` claiming still runs through the resolver, the existing `data-composition-id` / class / attribute-match fallback chain is intact for clips the index cannot resolve, the source file of an element is derived to match `closest()` exactly, and `getSourceScopedSelectorIndex` keeps its indexless signature for callers that have no index. The load-bearing test runs the FULL derivation twice over a generated 3,000-clip project — node resolution included, not a pre-resolved host — and asserts every `id` and `key` is byte-identical, covering the clips whose `clip.id` is null. A divergence there would silently drop selection, expanded state, the keyframe cache and lint findings.
@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