oh-my-ppt-data-anim

name	oh-my-ppt-data-anim
description	Must be read before adding or modifying Oh My PPT slide animations. Defines exportable data-anim usage, trigger decisions, and how to replace unsupported scripted/anime.js animation. Use when this capability is needed.
metadata	{"author":"arcsin1"}

Oh My PPT Data Anim

For deeper examples (trigger choice guide, scripted animation patterns, timing tips), read references/data-anim.md.

When to use

• Adding entrance or emphasis animation to slide elements
• Creating staggered reveal sequences for cards, steps, or list items
• Repairing broken or unsupported animation

When not to use

• Layout-only changes with no motion intent
• Adding animation in edit mode unless the user asks, the page already has animation, or you are fixing broken animation

30-second decision checklist

Before adding animation, answer these:

1. Reading path: which elements should appear first, second, third? Animation follows the reading path.
2. Trigger: load (default), stagger (repeated items), with (group together), after (sequence), click (presentation control only)?
3. Type: fade, slide, scale, fly, wipe, zoom, bounded emphasis — match the visual intent.
4. Duration: 300–1200ms. Shorter for subtle, longer for dramatic.

How to add animation

1. Declarative data-anim — preferred

Add data-anim attributes directly on HTML elements. This works in preview and exports deterministically to PPTX.

<div data-anim="fade-up" data-anim-delay="stagger(90)">Card 1</div>
<div data-anim="fade-up" data-anim-delay="stagger(90)">Card 2</div>
<div data-anim="fade-up" data-anim-delay="stagger(90)">Card 3</div>

2. Supported animation types

fade, fade-up, fade-down, fade-left, fade-right, scale-in, slide-up, slide-down, slide-left, slide-right, fly-in, wipe, zoom-in, spin-in, grow-shrink-soft, grow-shrink, grow-shrink-strong, pulse-soft, pulse, pulse-strong, exit-fade, exit-scale, exit-zoom, exit-wipe, exit-fly, path

3. Attributes

Attribute	Values	Notes
data-anim	type from supported list	required
data-anim-trigger	load, click, with, after	omit for load
data-anim-sequence	with, after	preferred load-order control for new content
data-anim-click-group	stable token such as step-1	only for contiguous click animations that should reveal on the same click
data-anim-from	left, right, top, bottom, center	direction/origin
data-anim-delay	ms or stagger(N)	stagger for repeated items
data-anim-stagger	ms	preferred new declarative stagger gap
data-anim-duration	ms	prefer 300–1200
data-anim-path	inline linear path string such as M 0 0 L 120 30	only for path type

4. Trigger patterns

stagger(N) — repeated items appearing in sequence:

<div data-anim="fade-up" data-anim-delay="stagger(90)">Point 1</div>
<div data-anim="fade-up" data-anim-delay="stagger(90)">Point 2</div>

data-anim-stagger="N" — preferred new syntax for repeated items:

<div data-anim="fade-up" data-anim-stagger="90">Point 1</div>
<div data-anim="fade-up" data-anim-stagger="90">Point 2</div>

with — group starts together with previous animated element:

<h2 data-anim="fade-up">Market Signal</h2>
<p data-anim="fade" data-anim-trigger="with" data-anim-delay="120">Supporting text.</p>

after — short auto-playing sequence:

<div data-anim="fade-up">1. First</div>
<div data-anim="fade-up" data-anim-trigger="after">2. Second</div>
<div data-anim="fade-up" data-anim-trigger="after">3. Third</div>

For new content, prefer data-anim-sequence so trigger semantics stay separate from load ordering:

<div data-anim="fade-up">1. First</div>
<div data-anim="fade" data-anim-sequence="with" data-anim-delay="80">Supporting note</div>
<div data-anim="fade-up" data-anim-sequence="after">2. Second</div>

click — only for explicit presentation control (step-by-step, one-by-one reveal). Use load, stagger, with, or after for timelines, processes, steps, and flows.

click-group — multiple contiguous click-triggered elements on the same build step:

<div data-anim="fade-up" data-anim-trigger="click" data-anim-click-group="reveal">Headline</div>
<div data-anim="pulse-soft" data-anim-trigger="click" data-anim-click-group="reveal">Badge</div>
<div data-anim="fade" data-anim-trigger="click">Next click step</div>

• Use only on data-anim-trigger="click" elements.
• Keep the grouped elements contiguous in DOM order.
• Do not use click-group as a timeline DSL or to jump across unrelated click steps.

Preview-only boundary

• Keep the standard editable lane focused on whole-element motion.
• splitText, per-letter/per-word choreography, SVG draw/morph helpers, and arbitrary path choreography are not part of the normal editable contract.
• The only supported path-like public motion in the editable lane is the constrained data-anim="path" semantic with an inline linear path string such as M 0 0 L 120 30. Richer path/draw/morph ideas belong to a future preview-only lane.
• data-anim-easing, data-anim-repeat, and data-anim-direction are runtime-only compatibility attributes. Do not use them in standard generated editable/exportable pages because PPTX export/import does not preserve them semantically.

5. Directional examples

<div data-anim="fly-in" data-anim-from="left">Side metric</div>
<div data-anim="wipe" data-anim-from="right">Process bar</div>
<div data-anim="slide-right">Supporting card</div>
<div data-anim="exit-wipe" data-anim-from="top">Dismissed panel</div>
<div data-anim="exit-scale">Quietly de-emphasized chip</div>
<div data-anim="exit-zoom">Dramatic hero outro</div>
<div data-anim="zoom-in">Hero number</div>
<div data-anim="pulse">Key risk</div>
<div data-anim="pulse-strong" data-anim-trigger="click">Escalation callout</>
Subtle confirmation

Scripted animation escape hatch

Use PPT.animate(targets, params) only when data-anim cannot express a complex timeline or synchronized choreography:

PPT.animate(".card", {
  opacity: [0, 1],
  translateY: [20, 0],
  duration: 500,
  delay: PPT.stagger(100)
})

• Targets is the first argument (a CSS selector string or DOM element), not an object property.
• Create timelines with PPT.createTimeline(targets, params).
• Use PPT.stagger(ms) for staggered scripted delays.

Hard rules

• Prefer no animation, load, stagger, with, or after before click.
• Use data-anim-click-group="name" only for contiguous click animations that share one reveal step.
• Keep emphasis choices bounded: pulse-soft|pulse|pulse-strong and grow-shrink-soft|grow-shrink|grow-shrink-strong.
• Do not use data-anim-easing, data-anim-repeat, or data-anim-direction in normal generated editable pages. Those attributes are runtime-only compatibility and are not part of the export-friendly contract.
• Use PPT.animate(selector, params) — targets is the first argument, not an object property. Call PPT.animate(...), never anime(...) or anime.timeline(...).
• The runtime handles initial hidden states automatically. Do not set opacity-0, invisible, visibility:hidden, display:none, or inline opacity:0 on animated elements.
• Use only the supported data-anim types listed above.

Failure repair strategy

When animation is broken or not playing:

1. Check the type value: must be from the supported list. Values like typewriter, glitch-in, path-draw are not supported.
2. Check for conflicting initial states: remove any manual opacity-0, invisible, visibility:hidden, display:none, or inline opacity:0 — the runtime sets these automatically.
3. Check for direct anime() calls: replace anime(...) or anime.timeline(...) with PPT.animate(...) or PPT.createTimeline(...).
4. Check targets argument format: PPT.animate takes targets as the first argument, not as an object property like { targets: ".card" }.

Chart animation boundary

Two levels of chart animation, each handled by a different system:

• Chart container entrance (the whole chart block fading/sliding in): add data-anim on the .ppt-chart-frame div.
• Chart internal drawing (bars growing, lines drawing): controlled by Chart.js options.animation. The runtime defaults handle this.
• Do not write custom JS timelines that animate individual chart elements. Use data-anim for the container, and Chart.js options for the internals.

Cross-skill references

• Animation follows the reading path defined by layout (see layout skill). Do not animate elements in an order that contradicts the visual hierarchy.

Export Contract Notes

from="center" compatibility

data-anim-from="center" cannot roundtrip reliably with trace-based motions (fly-in, wipe, exit-fly, exit-wipe). The validator will reject these incompatible combinations. Use center only with fade/zoom/path animations that don't depend on directional motion paths.

Click-group token identity

data-anim-click-group values preserve grouping structure and click timing when roundtripping through PPTX, but the token text itself may change (e.g., reveal → 1). The semantic behavior (elements grouped into the same click step) is preserved. Do not rely on token name identity across export/import — only structural grouping is guaranteed.

Sequence roundtrip boundary

data-anim-sequence="with|after" controls HTML→PPTX export timing, but PPTX import does not reconstruct this attribute. Sequence semantics are HTML→PPTX only, not roundtrip. Imported animations use trigger/delay to express timing.

Scale value approximation

External PPTX files with custom animation scale values (e.g., scaleTo=80000) are projected to the nearest built-in preset bucket via distance-based matching. The resulting data-anim type (e.g., exit-scale vs exit-zoom) is a best-fit approximation, not an identity-preserving roundtrip value. This applies to both entrance (zoom-in/scale-in/spin-in) and exit (exit-scale/exit-zoom) scale animations.

Path animation constraints

data-anim="path" requires data-anim-path with a constrained linear path format: M x y L dx dy (integer or decimal coordinates). More complex SVG path commands are not supported in the editable contract.

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Source: arcsin1/oh-my-ppt — distributed by TomeVault.