A scroll container that tracks overflow state using createState() signals and a raw effect function wrapping an IntersectionObserver. Demonstrates defining a component with no reactive properties (undefined for both props and select), building private signals inside the setup function rather than as declared properties, writing a custom effect function that returns a cleanup callback, using batch() to group multiple signal updates from a scroll handler, and applying multiple toggleClass() effects to host based on derived boolean state.
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Short content that doesn't overflow.
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module-scrollarea
None. This component updates host classes based on runtime scroll/overflow state.
| Name | Description |
|---|---|
orientation | Scroll axis mode. Use horizontal for left/right overflow; defaults to vertical behavior |
| Selector | Type | Required | Description |
|---|---|---|---|
host.firstElementChild | Element | optional | Observed content element used to detect overflow; without it, no effects are applied |