Function getElementState

packages/react/src/TreeView/useRovingTabIndex.ts:126–139

(element: HTMLElement)

}

export function getElementState(element: HTMLElement): 'open' | 'closed' | 'end' {
  if (element.getAttribute('role') !== 'treeitem') {
    throw new Error('Element is not a treeitem')
  }

  switch (element.getAttribute('aria-expanded')) {
    case 'true':
      return 'open'
    case 'false':
      return 'closed'
    default:
      return 'end'
  }
}

export function getVisibleElement(element: HTMLElement, direction: 'next' | 'previous'): HTMLElement | undefined {
  const root = element.closest('[role=tree]')