Automatically generated list items are failing to react to the active class

I am facing an issue with two divs in my project. The first div uses the Bootstrap class list-group and is populated with a basic example provided by Bootstrap. The second div is supposed to be populated with list-group-items obtained from an AJAX GET request. While the population works as expected, there is an issue when trying to switch between active elements.

The first div, which showcases the Bootstrap example, switches the active element correctly. However, the second div, which I have customized, does not.

Below is the HTML code snippet:

<button id="boton1">TEST</button>
    <div class="list-group col-md-3">
        <a href="#" class="list-group-item active">
          Cras justo odio
        </a>
        <a href="#" class="list-group-item">Dapibus ac facilisis in</a>
        <a href="#" class="list-group-item">Morbi leo risus</a>
        <a href="#" class="list-group-item">Porta ac consectetur ac</a>
        <a href="#" class="list-group-item">Vestibulum at eros</a>
    </div>

    <div class="panel panel-default col-md-3">
        <div class="panel-heading">Geolocation
          <span class="pull-right"><span class="fa fa-globe"></span></span>
        </div>
        <div class="panel-body" style="height: 400px;">
            <div class="list-group" id="ticker">

            </div>
        </div>
      </div>

Here is the JavaScript code:

$(document).ready(function(){
        var counter=0;
        var alert;
        $("#boton1").click(function() {
            for(var i=0; i<5; i++){
                counter++;
                if (counter===1){
                    alert = "<a class='list-group-item active' ";
                }else{
                    alert = "<a class='list-group-item' ";
                }
                alert+="href='#'>";
                // Alert title
                alert+="<h4 class='list-group-item-heading'>";
                alert+="Alert #"+counter;
                alert+="</h4>";
                // Alert text
                alert+="<p class='list-group-item-text'>";
                alert+="Hello!";
                alert+="</p>";
                alert+="</a>";
                $("#ticker").append(alert);
            }

        });

        $('.list-group-item').on('click',function(e){
            var previous = $(this).closest(".list-group").children(".active");
            previous.removeClass('active');
            $(e.target).addClass('active'); 
        });
    });

You can view the fiddle here: http://jsfiddle.net/txfjjzsm/

javascripttwitter-bootstrap

Answer №1

The binding of event handlers is exclusive to the elements currently selected; they must be present on the page when your code calls .on(). It is necessary to assign an event handler to all elements that match the current selector, both now and in the future.

$('.list-group').on('click', '.list-group-item', function (event) {
  event.preventDefault();

  $(this).addClass('active').siblings().removeClass('active');
});

Delegated events offer the benefit of being able to handle events from descendant elements that are added to the document later on.

View a live example here: http://jsfiddle.net/cdog/en1ucfj6/.

Answer №2

Here's something else:

$(".menu-container").on("click", ".menu-item", function (event) {
    $(".menu-item.active").removeClass("active");
    $(event.currentTarget).addClass("active");
});

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