Simple usage
HTML
<!-- Learn about this code on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/::after -->
<p class="boring-text">Here is some plain old boring text.</p>
<p>Here is some normal text that is neither boring nor exciting.</p>
<p class="exciting-text">Contributing to MDN is easy and fun.</p>
CSS
.exciting-text::after {
content: " <- Very EXCITING!";
color: green;
}
.boring-text::after {
content: " <- BORING";
color: red;
}