How to auto SUM TD value on click event inside TR with jquery

Question

How to auto SUM TD value (with class="abc") when TR gets clicked, and result of SUM must be inside a TD with class="total".

Below is my HTML:

<table>
<tr>
    <td>Bla bla</td>
    <td>Bla bla</td>
    <td class="abc">30</td>
<tr>
<tr>
    <td>Bla bla</td>
    <td>Bla bla</td>
    <td class="abc">40</td>
<tr>
<tr>
    <td>Bla bla</td>
    <td>Bla bla</td>
    <td class="abc">30</td>
<tr>
<tr>
    <td>Bla bla</td>
    <td>Bla bla</td>
    <td class="total">100</td>
<tr>
</table>

I mean like this:

Answer 1

Fiddle Demo

var total = $('td.total'), //cache your selectors
    td_abc = $('td.abc');
$('tr').click(function () { //handle click event on tr
    total.text(function () { //set total text
        var sum = 0; //set sum to 0
        td_abc.each(function () { //loop through each td element with class abc
            sum += +$(this).text() //add it text to sum
        });
        return sum; //set sum to total
    })
});

Learn jQuery

jQuery API

---

Updated After OP's comment

var total = $('td.total'),
    td_abc = $('td.abc');
$('tr').click(function () {
    $(this).find('td.abc').data('countme', 1).css('color', 'red');//set .data('countme', 1) to the td.abc inside tr
    total.text(function () {
        var sum = 0
        td_abc.filter(function () {
            return $(this).data('countme') == 1; //filter elements which has .data('countme', 1) to be added in sum
        }).each(function () {
            sum += +$(this).text()
        });
        return sum;
    })
});

Fiddle Demo

---

If you want toggle effect.If you click again it not count it in sum .

Fiddle Demo

Answer 2

Try,

$('tr').click(function(){
  var sum = 0;
  $('td.abc').each(function(){
    sum += parseInt($(this).text(),10);
  })
  $('td.total').text(sum);
});

DEMO

Answer 3

I would add a button like: <button id="sum">Sum</button> and the use this to sum the values:

$('#sum').on('click', function () {
    var sum = 0;
    $('table td.abc').each(function () {
        sum += parseInt(this.innerHTML, 10);
    });
    $('table td.total').html(sum);
});

Example

Answer 4

It is very simple, just add click event to TR and get all TD values with class="abc" and sum them to TD with class="total". Please see below code

$("tr").click(function(){
  var total = 0;
  $("td.abc").each(function(){
  total+=parseInt($(this).html()); // You can use parseFloat if value is float.
  });

  $("td.total").html(total);
});

Below is the answer after adding image to the quetion.
Here we can add a simple CSS class="clicked" to td if its parent tr gets clicked (you can add CSS effects like change bg-color to yellow or some color to show if tr is clicked or not) and remove class when it clicked again... And on the basis of class="clicked", we will add or remove values from total.

please see below code:

$("tr").click(function(){
      var total =  $("td.total").html();

      if(total==null || total=="")
         total = 0;     

      $(this).find(".abc").each(function(){
          var tdCSS = $(this).attr("class");
          if(tdCSS.indexOf("clicked")!=-1)
           { 
              total-=parseInt($(this).html()); // You can use parseFloat if value is float.
           }
           else
           {
             total+=parseInt($(this).html()); // You can use parseFloat if value is float.
           }
            $(this).toggleClass("clicked");
      });

      $("td.total").html(total);
    });