Creating HTML tables in JavaScript

Suppose we have such an empty HTML table:

html<table id="table"></table>

Let's fill this table with rows and columns. Here is an example of what we should obtain:

html<table id="table">
  <tr>
    <td></td>
    <td></td>
    <td></td>
  </tr>
  <tr>
    <td></td>
    <td></td>
    <td></td>
  </tr>
  <tr>
    <td></td>
    <td></td>
    <td></td>
  </tr>
</table>

To solve the problem, we need two nested loops. The first loop will create the rows of the table and the second will create the cells in each row:

javascriptlet table = document.querySelector('#table');

for (let i = 0; i < 3; i++) {
  let tr = document.createElement('tr');
  
  for (let i = 0; i < 3; i++) {
    let td = document.createElement('td');
    tr.appendChild(td);
  }
  
  table.appendChild(tr);
}