Pure JS Class Toggle
HTML
<a id="asdf" class="red" href="#" onclick="this.classList.toggle('green')">asfafdsfdsa</a>
CSS
.red {
background: red;
}
.green {
background: green;
}
<a id="asdf" class="red" href="#" onclick="this.classList.toggle('green')">asfafdsfdsa</a>
.red {
background: red;
}
.green {
background: green;
}