searxng/searx/templates/simple/simple_search.html

<form id="search" method="{{ method or 'POST' }}" action="{{ url_for('search') }}">
  <div id="search_wrapper">
    <div class="search_box">
      <input id="q" autofocus name="q" type="text" placeholder="{{ _('Search for...') }}" tabindex="1" autocomplete="off" spellcheck="false" dir="auto" {% if q %}value="{{ q }}"{% endif %} >
      <button id="clear_search" type="button" tabindex="-1"><span class="hide_if_nojs">{{ icon_big('close') }}</span><span class="show_if_nojs">{{ _('Clear search') }}</span></button>
      <button id="send_search" type="submit" tabindex="-1"><span class="hide_if_nojs">{{ icon_big('search-outline') }}</span><span class="show_if_nojs">{{ _('Start search') }}</span></button>
    </div>
  </div>
</form>