手风琴切换图标不可见答案

【问题标题】：accordion toggle icon not visible手风琴切换图标不可见
【发布时间】：2020-10-09 11:30:27
【问题描述】：

手风琴切换图标不可见，只有空白方块存在 In image I am getting blank square brackets

.accordion-toggle:after {
        color: #aaa;
        content: "\f146";
        display: block;
        font-family: FontAwesome;
        font-size: 10px;
        line-height: 36px;
        position: absolute;
        top: 3px;
        right: 15px;
        }
        
    .accordion-toggle.collapsed:after {
        content: "\f0fe";
    }

<div id="CLUSPanel" class="panel">
 <div class="panel-heading">
   <a class="accordion-toggle collapsed" 
            data-toggle="collapse" data-parent="#accordion" href="#CLUSPanelBody">
    								
          some text

      </a>
   </div>	 
</div>

【问题讨论】：

看起来像字体问题。你是如何加载 FontAwesome 的？
尝试删除内容"\f146" 并将"\25bc" 分配给.accordion-toggle:after，如.accordion-toggle:after { color: #aaa; content: "\25bc"; ...... }..
是的 ... content: "\25bc" 为我工作.. 可以从你得到 "\25bc" 的地方帮忙
\25bc 是黑色向下箭头的 Unicode。您的问题肯定与未检测到 Font Awesome 相关。要以您尝试的方式引用它，您需要加载 CSS 版本。

标签： html css twitter-bootstrap accordion collapse

【解决方案1】：

您只需要在页面的标题中包含 Font Awesome。您可以在下面的代码 sn-p 中看到该图标。无需进行其他更改。

<!doctype html>
<html lang="en">
  <head>
    <title>Title</title>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <!-- Font Awesome -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
    <style>
        .accordion-toggle:after {
        color: #aaa;
        content: "\f146";
        display: block;
        font-family: FontAwesome;
        font-size: 10px;
        line-height: 36px;
        position: absolute;
        top: 3px;
        right: 15px;
        }
        
        .accordion-toggle.collapsed:after {
            content: "\f0fe";
        }
    </style>
  </head>
  <body>
      <div class="container">
        <div id="CLUSPanel" class="panel">
            <div class="panel-heading">
              <a class="accordion-toggle collapsed" 
                       data-toggle="collapse" data-parent="#accordion" href="#CLUSPanelBody">
                                               
                     some text
           
                 </a>
              </div>	 
           </div>
      </div>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

【讨论】：

它的工作谢谢.. 更新我的字体系列后也为我工作：“Font Awesome 5 Free”，FontAwesome；到这个
@ravi 太棒了，很高兴我能帮上忙。确保选择一个选定的答案:)。