Pure JS is quite short in your case
myTable.firstChild.innerHTML += '<tr><td>my data</td><td>more data</td></tr>'
function add() {_x000D_
myTable.firstChild.innerHTML+=`<tr><td>date</td><td>${+new Date}</td></tr>`_x000D_
}
_x000D_
td {border: 1px solid black;}
_x000D_
<button onclick="add()">Add</button><br>_x000D_
<table id="myTable"><tbody></tbody> </table>
_x000D_
(if we remove <tbody>
and firstChild
it will also works but wrap every row with <tbody>
)