Function collapseNode

app/hooks/useVirtualTree.ts:138–153

(
  state: TreeState<T>,
  id: string
)

}

function collapseNode<T extends { id: string; children?: T[] }>(
  state: TreeState<T>,
  id: string
): TreeState<T> {
  const collapsedState = {
    ...state.collapsedState,
    [id]: true,
  };

  return {
    ...state,
    collapsedState,
    items: createNodeItems(state.nodes, 0, collapsedState),
    focusedNodeId: id,
  };
}
function toggleAllChildren<T extends { id: string; children?: T[] }>(
  state: TreeState<T>,
  id: string