<table id="tableexample">
<tr>
<td>example</td>
<td>Oct 3 2019 12:00AM</td>
<td>another</td>
</tr>
</table>

var somedate = document.querySelector("#_tableexample > tbody > tr:nth-child(3) > td:nth-child(2)").innerText;
moment(somedate,'MMM DD YYYY h:mm:a').toISOString();}