JQuery is changing checkbox value but the checkbox is not displaying as checked

With .attr() you set the value of an attribute in the DOM tree. Depending on the browser, browser version and jQuery version (especially 1.6), this does not always have the desired effect.

With .prop(), you manipulate the property (in this case, 'checked state'). I strongly recommend using .prop() in your case, so the following will toggle correctly:

$(this).find(".cbx input").prop('checked', true);

For further information, please refer to the documentation of .prop().

useing **.prop()** it worked for me !

$(document).on("click",".first-table tr",function(e){
if($(this).find('input:checkbox:first').is(':checked'))
{
    $(this).find('input:checkbox:first').prop('checked',false);
}else
{
    $(this).find('input:checkbox:first').prop('checked', true);
}
});

Almost right, just use 'checked' instead of true:

$(this).find(".cbx input").attr('checked', 'checked');

Update: Alternatively, you can use this with newer JQuery versions:

$(this).find(".cbx input").prop('checked', true);

Easy, the solution is to use $('xxxxxx').prop('checked', true) or false Test OK in Jquery 1.11.x.

Cheers

FULL DEMO CODE EXAMPLE

Examples: (Code JavaScript checkbox for a table)

    function checkswich() {
        if ($('#checkbox-select').is(':checked') == true) {
            selectTodo();
        } else {
            deSelectTodo();
        }
    }
    function selectTodo() {
        //$('#tabla-data input.ids:checkbox').attr('checked', 'checked');
        $('#tabla-data input.ids:checkbox').prop('checked', true);
    }
    function deSelectTodo() {
        //$('#tabla-data input.ids:checkbox').removeAttr('checked', 'checked');
        $('#tabla-data input.ids:checkbox').prop('checked', false);
    }
    function invetirSelectTodo() {
        $("#tabla-data input.ids:checkbox").each(function (index) {
            //$(this).attr('checked', !$(this).attr('checked'));
            $(this).prop('checked', !$(this).is(':checked'));
        });
    }

Examples: (Code HTML checkbox for a table)

           <table id="tabla-data" class="table table-striped table-bordered table-hover table-condensed">
                <thead>
                    <tr>
                        <th class="text-center" style="width: 5px"><span class="glyphicon glyphicon-check"></span></th>
                        <th>Engine</th>
                        <th><a href="#" class="">Browser</a></th>
                        <th class="td-actions text-center" style="width: 8%;">Acciones</th>
                    </tr>
                </thead>
                <tbody id="tabla-data" class="checkbox-data">
                    <tr>
                        <td class="text-center"><input type="checkbox" class="ids" name="[]id" value=""></td>
                        <td>#########</td>
                        <td>#######</td>
                        <td class="td-actions text-center">
                            <?= $this->element('table-data-bts',['id'=>1234,'action'=>['view'=>'view', 'edit'=>'edit', 'delete'=>'delete']]) ?>
                        </td>
                    </tr>
                    <tr>
                        <td class="text-center"><input type="checkbox" class="ids" name="[]id" value=""></td>
                        <td>#########</td>
                        <td>#######</td>
                        <td class="td-actions text-center">
                            <?= $this->element('table-data-bts',['id'=>1234,'action'=>['view'=>'view', 'edit'=>'edit', 'delete'=>'delete']]) ?>
                        </td>
                    </tr>
                    <tr>
                        <td class="text-center"><input type="checkbox" class="ids" name="[]id" value=""></td>
                        <td>#########</td>
                        <td>#######</td>
                        <td class="td-actions text-center">
                            <?= $this->element('table-data-bts',['id'=>1234,'action'=>['view'=>'view', 'edit'=>'edit', 'delete'=>'delete']]) ?>
                        </td>
                    </tr>
                </tbody>
            </table>

Example: (Code ComponentHTML use JavaScript)

<form id="form-datos" action="/url/demo/blablaaa" method="post" enctype="multipart/form-data" style="visibility: hidden;" >
<input type="hidden" name="accion" id="accion">

<div class="btn-group">
<span class="btn btn-default btn-xs"><input type="checkbox" id="checkbox-select" onclick="checkswich()"></span>
<button type="button" class="btn btn-default btn-xs dropdown-toggle dropdown-toggle-check" data-toggle="dropdown" aria-haspopup="true"
        aria-expanded="false">
    <span class="caret"></span>
    <span class="sr-only">Options</span>
</button>
<ul class="dropdown-menu">
    <li><a href="#" onclick="accion()">Action Demo</a></li>
    <li role="separator" class="divider"></li>
    <li><a href="#" onclick="selectTodo()">Select All</a></li>
    <li><a href="#" onclick="deSelectTodo()">UnSelet All</a></li>
    <li><a href="#" onclick="invetirSelectTodo()">Inverse Select</a></li>
</ul>