jquery find parents of specific inputs and apply class

Question

I have a selection div with checkboxes inside and I'm trying to style them with bootstrap buttons and jQuery. Each input checkbox takes the attribute "checked" by php. So what I need is:

• find all the inputs which are 'checked', go to their parent labels and eventually addClass active .

My html (in php foreach loop)

<?php
global $wpdb;
$ss = "select * from ".$wpdb->prefix."project_email_alerts where uid='$uid'";
$rr = $wpdb->get_results($ss);
$terms = get_terms( 'project_cat', 'parent=0&orderby=name&hide_empty=0' );
foreach($terms as $term):
    $chk = (KleeiaDev_check_list_emails($term->term_id, $rr) == true ? "checked='checked'" : "");?>
    <div data-toggle="buttons" class="btn-group bizmoduleselect">
        <label id="b-<?php echo $term->term_id; ?>" class="btn btn-default">
            <div class="bizcontent">
                <input id="a-<?php echo $term->term_id ?>" type="checkbox" name="email_cats[]" <?php echo $chk ?> value="<?php echo $term->term_id ?>" />
                <span class="glyphicon glyphicon-ok glyphicon-lg"></span>
                <h5><?php echo $term->name ?></h5>
            </div>
        </label>
    </div>
<?php endforeach; ?>

I've tried with jQuery at this way, searching on other similar questions without success:

if($('input').is(':checked')){
   jQuery(this).parent('label').addClass('active');
}

I've tried with some use of .each but not really sure about that.

Answer 1

You can use

$('input[type=checkbox]:checked').parents('label').addClass('active');

  $('input[type=checkbox]:checked').parents('label').addClass('active'); 

 .active{ color: red; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div> <label > <input type='checkbox' checked='true'> Check me <label> </div> <div> <label> <input type='checkbox'> Check me <label> </div> 

Answer 2

Maybe it's important to add class on client side, but on server side you can do it too:

$chk = (KleeiaDev_check_list_emails($term->term_id, $rr) == true ? "checked='checked'" : "");?>
<label id="b-<?php echo $term->term_id; ?>" class="btn btn-default <?=!empty($chk) 'active' : ''?>">