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Modal Morph

A small card expands into a full panel, shared-element style: both layouts measured once at mount, the container morphs by transform only (never width/height tweens) while keyed children counter-scale and re-flow onto their own measured targets as pure functions of time.

Paste it into your composition

Open compositions/components/modal-morph.html and copy what is inside into your own composition.A component has no size or duration of its own. It takes both from the composition you paste it into.

Variables

Every one of these has a default, so the piece works untouched. Set the ones you want to change on the element:Set them with data-variable-values on the element that mounts it. These are the defaults, so this behaves exactly like the preview above until you change one:
Tagged motion-primitive structure flip shared-element modal deterministic experiment.

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