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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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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.