openproject/frontend/app/components/wp-relations/wp-relations-create/wp-relations-autocomplete/wp-relations-autocomplete.template.html

<form name="add_relation_form" class="form">
  <input type="text"
         class="wp-relations--autocomplete ui-autocomplete--input"
         ng-class="{ '-error': noResults }"
         placeholder="{{ ::text.placeholder }}">
  <div class="ui-autocomplete--loading" style="display: none">
    <div class="loading-indicator -small">
      <div class="block-1"></div>
      <div class="block-2"></div>
      <div class="block-3"></div>
      <div class="block-4"></div>
      <div class="block-5"></div>
    </div>
  </div>
</form>