JSFiddle - React, Tailwind, and code Playground

HTML

<table id="ItemsTable" >
    <tbody>
   <tr>
     <th>
       Number
     </th>
     <th>
       Number2
     </th>
    </tr>
  <tr>
    <td>32174711</td>     <td>32174714</td>
  </tr>
  <tr>
    <td>32174712</td>     <td>32174713</td>
  </tr>
</tbody>
</table>

JavaScript

var arr = $('#ItemsTable tr').find('td:first').map(function() {
    return $(this).text()
}).get()

console.log(arr)