twig - 用替换在树枝上添加字符

Question

我想在树枝中添加 ** 之类的字符和替换。

 {% if faq.customer_username|length > 2 %}
    <span class="card-user colorBlack fz12"> 
        {{faq.customer_username|replace({(faq.customer_username|last):'**'}) }}
    </span>
 {% else %}
    <span class="card-user colorBlack fz12">
  {{ faq.customer_username|replace({(faq.customer_username): faq.customer_username + '**'}) }}
   </span>
{% endif %}

但它不起作用请帮助我非常感谢

标签： twig