单击按钮时未显示Bootstrap加载图标

如何解决单击按钮时未显示Bootstrap加载图标

当我单击按钮时，不会出现加载符号。我已经尝试过StackOverflow的一些解决方案，但是都没有用。有人遇到过这个问题并解决了吗？

我正在使用Bootstrap 4作为参考

$('#btn-one').click(function() {
  $('#btn-one').html('<span class="spinner-border spinner-border-sm mr-2" role="status" aria-hidden="true"></span>Loading...').addClass('disabled');
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<button type="button" id="btn-one" class="btn btn-primary">Click me!</button>

编辑：整个代码段。我要添加我正在使用的确切HTML模板

<head>
    
    
    
    
</head>
<body>

   
                <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
                <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

                <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZonixN0hoP+VmmDGMN5t9UJ0Z" crossorigin="anonymous">

                <script>
                    $('#btn-one').click(function() {
                        $('#btn-one').html('<span class="spinner-border spinner-border-sm mr-2" role="status" aria-hidden="true"></span>Loading...').addClass('disabled');
                      });  
                </script>
                <button type="button" id="btn-one" class="btn btn-primary">Click me!</button>
                
            </form>
            
            <!-- Modal -->
            
        </div>
    
    </div>

</body>

解决方法

v4.2.0中的Bootstrap微调器组件has been added。您需要使用此版本或更高版本。

$('#btn-one').click(function() {
  $('#btn-one').html('<span class="spinner-border spinner-border-sm mr-2" role="status" aria-hidden="true"></span>Loading...').addClass('disabled');
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z" crossorigin="anonymous">

<button type="button" id="btn-one" class="btn btn-primary">Click me!</button>