CngxChipStripRovingOptions

Element hosting the chip wrappers. Read lazily at focusAt() time so the controller doesn't depend on view-init timing. null is a legitimate idle state - the controller becomes a no-op focuser.

Reactive length of the chip list. When this count shrinks below activeIndex, the controller clamps the active index so focus never dangles at a removed position.

Document writing direction. Omit to read the ambient injectDirection signal (the common case); pass an explicit signal to force a direction for this strip. Mirrors the direction option the tab / stepper / slider keyboard factories take, so under rtl plain ArrowLeft roves forward and ArrowRight back on the inline axis.

Attribute name used to identify each chip wrapper. Combined with the active index into a [attr="index"] query. Defaults to 'data-reorder-index' (matches CngxReorder's own item contract, so a single DOM hook covers both the reorder directive and this roving controller).