gistfile1.txt

  {% if flash %}
    <div class="alert alert-dismissible rounded-bottom fade show alert-{{flash.name | replace(from="error", to="danger")}}" role="alert">
      <button type="button" class="close" data-dismiss="alert" aria-label="Close">
        <span aria-hidden="true">&times;</span>
      </button>
      <strong class="pr-3">
        {% if flash.name == "error" %}
          <span class="fa fa-times-circle fa-lg"></span>
        {% elif flash.name == "warning" %}
          <span class="fa fa-exclamation-circle fa-lg"></span>
        {% elif flash.name == "success" %}
          <span class="fa fa-check-circle fa-lg"></span>
        {% endif %}
      </strong>{{flash.message}}
    </div>
  {% endif %}