Feature data collapsable state #35
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While a `CollapsableItem` is expanding or collapsing, the `data-collapsable-state` attribute is set to `expanding` or `collapsing`. This attribute is removed immediately after the transition completes. This can be useful in CSS, for example, to apply `@starting-style` only to the item currently expanding or collapsing. This makes it easier to use `display: none` for hiding collapsed items while still allowing transitions for expansion. Additionally, when applied via the data attribute, `@starting-style` won’t affect nested collapsable elements that are already expanded, preventing unwanted transitions.
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While a
CollapsableItemis expanding or collapsing, thedata-collapsable-stateattribute is set toexpandingorcollapsing. This attribute is removed immediately after the transition completes.This can be useful in CSS, for example, to apply
@starting-styleonly to the item currently expanding or collapsing. This makes it easier to usedisplay: nonefor hiding collapsed items while still allowing transitions for expansion. Additionally, when applied via the data attribute,@starting-stylewon’t affect nested collapsable elements that are already expanded, preventing unwanted transitions.