takahe/templates/activities/_hashtag_follow.html

{% if follow %}
    <button title="Unfollow" class="active" hx-trigger="click, keyup[key=='Enter']" hx-post="{{ hashtag.urls.unfollow }}" hx-swap="outerHTML" tabindex="0">
        Unfollow
    </button>
{% else %}
    <button title="Follow" hx-trigger="click, keyup[key=='Enter']" hx-post="{{ hashtag.urls.follow }}" hx-swap="outerHTML" tabindex="0">
        Follow
    </button>
{% endif %}