CSS: before / after content with title
A workaround for this, is to have two pseudo elements.
For example the ::after is the main element and the ::before will be shown on hover and acts like a title.
Also, you can use javascript or jQuery code to detect mouse events over the pseudo element.
Demo
Bellow is the demo explanation:
$('.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();
}
});.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;
}<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>You don't need a pseudo-element for that:
p {
background:lightblue;
padding:15px;
margin:15px;
}<p class="hover-me" title="I Show up on Hover">Some Text</p>However, if you need to use a pseudo element
p {
background:lightblue;
padding:15px;
margin:15px;
position: relative;
}
p:hover:after {
position: absolute;
content:attr(data-title);
left:0;
top:0;
width:200px;
height:1.25rem;
background-color: blue;
color:white;
}<p class="hover-me" data-title="I Show up on Hover">Some Text</p>