html - How to change content on hover

Question

I've been playing around with this, and I thought it would be pretty simple. What I'm trying to do is hover over the 'NEW' label. Once in its hover state, change the content from 'NEW' to 'ADD' using only CSS.

body{
    font-family: Arial, Helvetica, sans-serif;
}
.item{
    width: 30px;
}
a{
    text-decoration:none;
}
.label {
    padding: 1px 3px 2px;
    font-size: 9.75px;
    font-weight: bold;
    color: #ffffff;
    text-transform: uppercase;
    white-space: nowrap;
    background-color: #bfbfbf;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
    text-decoration: none;
}
.label.success {
    background-color: #46a546;
}

.item a p.new-label span{
  position: relative;
  content: 'NEW'
}
.item:hover a p.new-label span{
  display: none;
}
.item:hover a p.new-label{
  content: 'ADD';
}

<div class="item">
    <a href="">
         <p class="label success new-label"><span class="align">New</span></p>
    </a>
</div>

Answer 1

The CSS content property along with ::after and ::before pseudo-elements have been introduced for this.

.item:hover a p.new-label:after{
    content: 'ADD';
}

JSFiddle Demo