 1'
      );

      data.users.push({ name: 'B', age: 2 });
      test(d1.children.length === 3, 'el#d1 has three children');
      test(
        d1.children[0].children[0].innerText === 'A',
        'el#d1[0][0] innerText is still A'
      );
      test(
        d1.children[0].children[1].innerText === '1',
        'el#d1[0][1] innerText is still 1'
      );
      test(
        d1.children[1].children[0].innerText === 'B',
        'el#d1[1][0] innerText is B'
      );
      test(
        d1.children[1].chi