在表中显示数组的数组

<table id="arrayTable">
  <thead>
    <tr>
      <th>Index</th>
      <th>Array</th>
    </tr>
  </thead>
  <tbody>
  </tbody>
</table>

var arrayData = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

var tableBody = document.querySelector('#arrayTable tbody');

arrayData.forEach(function(row, rowIndex) {
  var tableRow = document.createElement('tr');
  
  var indexCell = document.createElement('td');
  indexCell.textContent = rowIndex;
  tableRow.appendChild(indexCell);
  
  var arrayCell = document.createElement('td');
  arrayCell.textContent = JSON.stringify(row);
  tableRow.appendChild(arrayCell);
  
  tableBody.appendChild(tableRow);
});

Index | Array
--------------
0     | [1, 2, 3]
1     | [4, 5, 6]
2     | [7, 8, 9]