JSFiddle - React, Tailwind, and code Playground

HTML

<table id="scrolltable" class="table">
   <thead>
    <tr>
	 <th>Code</th>
     <th>Product</th>
	 <th>First</th>
     <th>Add</th>
     <th>Qty</th>
     <th>File</th>
     <th>Action</th>
   </tr>
   </thead>
<tbody>
    <tr><td><input type="text" name="code" id="code1"   /> </td>
        <td><input type="text" name="product[]" value=""  class="input-medium" id="product1"  /> </td>
<td><input type="text" name="first[]" value=""  class="input-small" id="first1"/></td>
<td><input type="text" name="additn[]" value=""  class="input-small" id="additn1" /></td>
<td><input type="text" name="qty[]" value=""  class="input-small" id="qty1" /></td>
<td><input type="file" name="oldfilename[]" value=""  class="input-small" id="oldfilename1" /></td>
 <td><input type="button" id="addmorePOIbutton" style="width:25px;" value="+" onClick="insRow()"/>
    <input type="button" id="delPOIbutton" style="width:25px;" value="-" onClick="deleteRow(this)" disabled />
   </td></tr>
     </tbody>
       </table>

<script>
    function insRow()
		  {
			  var x=document.getElementById('scrolltable');
			  var new_row = x.rows[1].cloneNode(true);
			  var len = x.rows.length;
			
  			  var code=document.getElementById('code1').value;
			  var product=document.getElementById('product1').value;
			  var first=document.getElementById('first1').value;
			  var additn=document.getElementById('additn1').value;
			  var qty=document.getElementById('qty1').value;
			  var oldfname=document.getElementById('oldfilename1').value;
			  var lastIndex = oldfname.lastIndexOf("\\");
				if (lastIndex >= 0) {
					oldfname = oldfname.substring(lastIndex + 1);
				}


			  var inp1 = new_row.cells[0].getElementsByTagName('input')[0];
			  inp1.id += len;
			  inp1.value = code;
			  inp1.setAttribute('readonly', 'readonly');

			  var inp2 = new_row.cells[1].getElementsByTagName('input')[0];
			  inp2.id += len;
			  inp2.value = product;
			  inp2.setAttribute('readonly', 'readonly');

			  var inp3 =...

JavaScript

$(document).ready(function(){});