Public attributes and slots
label (Tabs), orientation (horizontal/vertical), selected-index and silent selectedIndex; direct cem-tab payloads require unique value and label and accept disabled. Default tab content is retained panel content. Class, hidden and dir use native host behavior. Boolean attributes use presence, including empty and false-valued attributes.
| Attribute | Contract |
|---|---|
label | Visible disclosure/tab/workflow label or the default accessible name; a non-empty string. |
aria-label | Optional accessible-name override on the native semantic owner. Omit to use label. |
orientation | horizontal (default) or vertical; determines arrow-key axis and layout. |
selected-index | Zero-based selected panel index; defaults to the first enabled item. Programmatic changes are silent. |
class | Optional consumer styling classes on the host; public internal hooks use part. |
hidden | Native host visibility; present removes the component from layout and keyboard navigation. |
dir | Native text direction: ltr or rtl, inherited when omitted. |
Arrow keys on the orientation axis and Home/End browse enabled tabs. Enter/Space activates. Focus browsing never changes selection; leaving restores the selected entry stop. Edit a panel field and switch away and back to check retention.
Five theme modes
Files panel
Unavailable panel
Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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Files panel
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