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hyperframes/packages/cli/src/docs/data-attributes.md
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Vance Ingalls 20be2ea1c2 style: apply oxfmt baseline formatting across all source files (#25)
## Summary
- Run `oxfmt .` across the entire codebase to establish formatted baseline
- 299 files changed — mechanical formatting only, no logic changes
- Double quotes, semicolons, 2-space indent, trailing commas, 100 print width

Part 3/4 of [VA-851](https://linear.app/heygen/issue/VA-851/pre-migration-configure-eslint-prettier-and-conventional-commits)

## Test plan
- [x] `pnpm format:check` — all 426 files pass
- [x] `pnpm -r typecheck` — all packages pass
- [x] `pnpm build` — all packages build
- [x] All 348 tests pass
2026-03-23 17:15:14 -07:00

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Markdown

# Data Attributes
Core attributes for controlling element timing and behavior.
## Timing
- `data-start="0"` — Start time in seconds
- `data-duration="5"` — Duration in seconds
- `data-track-index="0"` — Timeline track number (controls z-ordering)
## Media
- `data-media-start="2"` — Media playback offset / trim point (seconds)
- `data-volume="0.8"` — Audio/video volume, 0 to 1
- `data-has-audio="true"` — Indicates video has an audio track
## Composition
- `data-composition-id="root"` — Unique ID for composition wrapper (required)
- `data-width="1920"` — Composition width in pixels
- `data-height="1080"` — Composition height in pixels
- `data-composition-src="./intro.html"` — Nested composition source
## Element Visibility
Add `class="clip"` to timed elements so the runtime can manage their visibility lifecycle.