jQuery .on() method doesn’t see new elements

Question

You are not using the correct code to get live functionality.

$('#title-items').on('click', 'a', function(e) {
    alert('clicked');
    e.preventDefault();
});

First, select your common ancestor element (#title-items in this example). You can use document here too if you want to handle all a elements.
Pass the event type (on), then the sub selector (a), and then the callback function for the event.

Now, when click events bubble up to #title-items, it will check to see if the element is an a element, and if so, fire the callback.