datat.fi/_includes/search-form.html

<div class="inner">
  {% if site.search %}
    {%- assign search_provider = site.search_provider | default: "lunr" -%}
    {%- case search_provider -%}
      {%- when "lunr" -%}
        <label class="visually-hidden" for="search">{{ site.data.theme.t.site_search | default: 'Site Search' }}</label>
        <input type="text" id="search" class="search-input" aria-describedby="results-count" tabindex="-1" placeholder="{{ site.data.theme.t.search_placeholder_text | default: 'Enter your search term...' }}" />
        <div id="results" class="results"></div>
      {%- when "algolia" -%}
        <div tabindex="-1" class="search-searchbar"></div>
        <div class="search-hits"></div>
    {%- endcase -%}
  {% endif %}
</div>