<a>Без перехода</a> <a class="with-fast-transition">Переход 0.5s</a> <a class="with-slow-transition">Переход 3s</a>
a { background: lightgrey; color: grey; margin-right: 10px; padding: 5px 10px; transition: none; cursor: pointer; text-decoration: underline; } a:hover { background: yellow; color: red; } a.with-fast-transition { transition: 0.5s; } a.with-slow-transition { transition: 3s; }