JQuery Table add/remove dynamic data.

by Yashwanth M

HTML

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script type="text/javascript" src="https://code.jquery.com/jquery-2.2.4.js"></script>
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<body>
<body>
<table id="productTable" class="table table-hover table-bordered">
  <thead>
    <tr>
      <th>No.</th><th>Product</th><th>Price</th><th>Action</th>
    </tr>
  </thead>
  <tbody id="mainBody">
    
  </tbody>
  <tfoot>
    <tr>
      <td></td>
      <td></td>
      <td>
      Expected Total:<span id="total">0</span><br>
      Added Total:<span id="totalAdd">0</span>
     </td>
      <td></td>
    </tr>
  </tfoot>
</table>

<button type="button" class="add-new btn btn-info" id="add-new">Add New Income</button>

<!-- https://stackoverflow.com/a/18674066/5081877 -->
<script id="hidden-template" type="text/x-custom-template">
  <tr id="mainRow">
	<td>${sno}</td>
	<td>
		<select name="selectProduct" id="productOption" class="form-control" selected="${optionVal}">
		<option value="0"> -- Select One --</option>
		<option value="1"> IPhone </option>
		<option value="2"> MAC </option>
		<option value="3"> Windows </option>
		</select>
	</td>
	<td>
		<input id="number_only" pattern="[0-9]" type="text" class="form-control" />
	</td>
	<td><!-- glyphicon-plus | glyphicon-remove -->
		<button type="button" class="add-new btn btn-info glyphicon glyphicon-plus"></button>
	</td>
  </tr>
</script>
</body>

CSS

// https://stackoverflow.com/questions/11162556/javascript-onchange-sum-input-after-percentage

// https://stackoverflow.com/questions/46561528/how-to-add-the-multiple-keyup-event-values-in-a-single-field

JavaScript

const dynamic_JS = ({ sno, optionVal, price }) => `<tr><td>${sno}</td>  <td><select name="selectProduct" class="form-control" selected="${optionVal}"><option value="0"> -- Select One --</option><option value="1"> IPhone </option><option value="2"> MAC </option><option value="3"> Windows </option></select></td>  <td><input type="text" class="form-control" value="${price}" title="" ></td>  <td><button type="button" class="remove-row btn btn-info glyphicon glyphicon-remove" ></button></td>  </tr>`;
// onclick=\'removeRow(this)\' 

//window.onload=function(){}
$(document).ready(function() {
	var template_add = $('#hidden-template').text();
	function render(props) {
	  return function(tok, i) {
		return (i % 2) ? props[tok] : tok;
	  };
	}
	var items = [  { sno: '1', optionVal: '0', price: '0' }  ];
	var dynamic_HTML = template_add.split(/\$\{(.+?)\}/g);

	$('tbody').append(items.map(function(item) {
	return dynamic_HTML.map(render(item)).join('');
	}));

});

// https://stackoverflow.com/a/35592412/5081877
$('table#productTable > tbody > tr > td:nth-child(3) > input').on('input propertychange', function() {
	$.each($('input[type=text]'), function () {
  	this.value = this.value.replace(/[^0-9]/g, '');
  });
});


$('.add-new').on('click', function () {
  $("#productTable").each(function () {

	var tr_last = $('tbody > tr:last', this).clone();
	var td_no = tr_last.find('td:first');
	var serialNumber = parseInt(td_no.text()) + 1;


	// https://stackoverflow.com/a/6588327/5081877
	var tr_first_input = $('tbody > tr:first > td:nth-child(3) > input');
	var tr_first_price = parseFloat(tr_first_input.val()) || 0;
	console.dir( tr_first_price );
	
	totalamount += tr_first_price;
	$('#totalAdd').text(totalamount);

	var tr_first_selected = $('tbody > tr:first > td:nth-child(2) > select option').filter(":selected");
	// option:selected | .find(":selected") ~ .text(), ~.attr('value');
	var selectedValue = tr_first_selected.val(), optionText =...