LFTroya

const arr = [
  {id: 1, title: 'hello', parent_id: 0},
  {id: 2, title: 'hello', parent_id: 0},
  {id: 3, title: 'hello', parent_id: 1},
  {id: 4, title: 'hello', parent_id: 3},
  {id: 5, title: 'hello', parent_id: 4},
  {id: 6, title: 'hello', parent_id: 4},
  {id: 7, title: 'hello', parent_id: 3},
  {id: 8, title: 'hello', parent_id: 2}
];