Read text on Table

Hi experts, I need to change the html into value since the source "sTable7" is type text.  I have tried this tr.find('td:eq(1)').value; but not working.

<script>
$(function() {
  $(document ).on("click","#sTable7 button.iAddbutton",function() {
    let tr = $(this).closest('tr');
    let a = tr.find('td:eq(1)').html();
    let b = tr.find('td:eq(2)').html(); 
    
    alert(a);    
  });
});
</script>

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