Checkbox check and unchecked event in jquery

Question

I have checkboxes in my checkbox list like following:

<div class="pop-mission-to">
    <label>
        <input class="check-brand" type="checkbox" name="" value="1" data-id="1">
    </label>
</div>

<div class="pop-mission-to">
    <label>
        <input class="check-brand" type="checkbox" name="" value="2" data-id="2">
    </label>
</div>

I have created a on click function in jQuery like this, just to check if its gonna react or anything:

$('.check-brand').click(function() {
    alert("Checkbox checked");
});

However when I click the checkbox nothing happens. What am I doing wrong?

Edit, guys I'm creating this HTML after $.Post like following:

$('.check-user').click(function() {
    var $this = $(this);
    var user_id = $this.attr('value');
    var brandContainer = $this.closest('.pop-state').siblings('.pop-brands');
    brandContainer.html('<p style="margin: 10px !important;">Processing... </p>');
    $.post('/user/usersBrands', { userId: user_id } , function(data) {
        console.log(data);
        var brands = JSON.parse(data);
        var container = $('<div class="pop-mission-co" />');

        brands.forEach(function (brand, index) {
            var isRegisteredToBrand = null;
            console.log(brand.userId);
            if(brand.userId==null)
            {
                isRegisteredToBrand = false;
             }
            else{
                isRegisteredToBrand = true;
            }
            console.log(isRegisteredToBrand);
            container.append(buildBrand(brand.id, brand.name, isRegisteredToBrand, index));
        });
        function buildBrand(id, name, isActive, index) {
            var isChecked = isActive ? 'checked="checked"' : ' ';
            return $(
                '<div class="pop-mission-to">' +
                    '<label>' +
                        '<input class="check-brand"' +
                            isChecked +
                            'type="checkbox"' +
                            'name=""' +
                            'value="' + id + '"' +
                            'data-id="' + index + '">'
                                + name +
                    '</label>' +
                '</div>'
            );
        }
        brandContainer
            .children('p').remove();
        brandContainer
            .html(container)
            .find('.pop-mission-co').show();
    });
});

Perhaps the fact because the HTML is generated after $.post call in jquery, that's the reason why it doesn't triggers the event??

Answer 1

The issue is because you are appending the element dynamically after the DOM has been loaded, so you need to use a delegated event handler. Also note that you should use the change event on checkboxes, not click. Try this:

$('.check-user').click(function() {
    var $this = $(this);
    var user_id = $this.attr('value');
    var brandContainer = $this.closest('.pop-state').siblings('.pop-brands');

    brandContainer.on('change', '.check-brand', function() {
        alert("Checkbox checked");
    });

    // the rest of your code...
});