Emulates events over pseudo elements

Display title over pseudo element and emulates mouse events on it

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div class="alert">
  <strong>Hover</strong> over X to display the title.
</div>

CSS

.alert {
    padding: 15px;
    margin: 50px 0 20px;
    border: 1px solid transparent;
    border-radius: 4px;
    position: relative;
    color: #a94442;
    background-color: #f2dede;
    border-color: #ebccd1;
    font-size: 0.85em;
    transition: all 1s;
}
.alert::after, .alert::before {
    content: 'X';
    position: absolute;
    right: 0;
    top: 0;
    width: 40px;
    height: 100%;
    font-size: 0.85em;
    padding: 0;
    line-height: 40px;
    text-align: center;
    font-weight: 900;
    font-family: cursive;
    cursor: pointer;
}
.alert::before {
    display: none;
    content: 'This is a Title';
    top: -105%;
    width: auto;
    border: inherit;
    border-radius: inherit;
    padding: 0 0.4em;
    background: rgba(0, 0, 0, 0.48);
    color: white;
}
.alert.hover::after {
    color: white;
    filter: sepia(10%);
    transform: scale(1.1);
    border-radius: inherit;
    border: inherit;
    background: inherit;
}
.alert.hover::before {
    display: inline-block;
}

JavaScript

$('.alert').on('mousemove', function(e) {
  if (e.offsetX > (this.offsetWidth - 42)) { //42 is the ::after element outerWidth
    $(this).addClass('hover');
  } else {
    $(this).removeClass('hover');
  }
}).on('mouseleave', function(e) {
  $(this).removeClass('hover');
}).on('click', function(e) {
    if (e.offsetX > (this.offsetWidth - 42)) { //42 is the ::after element outerWidth
        $(this).remove();
    }
});