my.multiLevelSelect

my.multiLevelSelect({
  title: 'Select Location',
  list: [
    {
      name: 'USA',
      subList: [
        { name: 'California' },
        { name: 'New York' }
      ]
    }
  ],
  success: (res) => {
    console.log('Selected:', res.result);
  }
});