<button class="button is-active">
Primaarne
</button>
<button class="button button--secondary is-active">
Sekundaarne
</button>
<button class="button button--contrast is-active">
Kontrastne
</button>
<button class="button button--triarity is-active">
Tertsiaarne
</button>
{
"state": "is-active"
}