quay/static/directives/config/config-string-field.html

<div class="config-string-field-element">
  <form name="fieldform" novalidate>
    <input type="text" class="form-control" placeholder="{{ placeholder || '' }}"
           ng-model="binding" ng-trim="false" ng-minlength="1"
           ng-pattern="getRegexp(pattern)" required>
  </form>
</div>