Using JavaScript to add an icon to toggle button events

Question

function toggledDeleteAllBtn(){
        if( $('.customer_checkbox:checked').length > 0){
            $('#sel_button').text('Deleted all selected(' $('.customer_checkbox:checked').length ')');
          
        }else{
            $('#sel_button').text('Delete all selected');
        }

        
    }

            <tr id="sid">
                <th>ID</th>
                <th>phone number</th>
                <th>remarks</th>
                <th>date</th>
                <th></th>
                <th><input type="checkbox" name="main-checkbox"></th>
                <th><button class="btn btn-danger btn-sm" id="sel_button" name="sel_button" ><i class="glyphicon glyphicon-trash" id="trash_icon"></i>Delete all </button></th>
        

            </tr>

请问如何将 iclass 中的图标垃圾添加到函数 toggleDeleteAllBtn() 中，以便无论进行什么更改，图标始终显示？ （需要在toggleDeleteAllBtn()中进行一些修改） 谢谢！

Answer 1

I used Mamun's answer as a reference and went back to the icons I liked. (Just realized Mamun had deleted his original answer because he was using font Awesome instead of glyphicon. Anyway, thank you so much for giving me these ideas!)

function toggledDeleteAllBtn() {
  if ($('.customer_checkbox:checked').length > 0) {
    $('#sel_button').html('<i class="glyphicon glyphicon-trash" </i>Delete all selected(' + $('.customer_checkbox:checked').length + ')');
  } else {
    $('#sel_button').html('<i class="glyphicon glyphicon-trash" </i>Delete all selected');
  }
}
$(document).on('click', '.customer_checkbox', toggledDeleteAllBtn);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.4/jquery.min.js">
</script>
<script src="plugins/Jquery-Table-Check-All/dist/TableCheckAll.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js">
</script>

<table>
  <tr id="sid">
    <th> ID </th>
    <th> phone number </th>
    <th> remarks </th>
    <th> date </th>
    <th></th>
    <th><input type="checkbox" class="customer_checkbox" name="main-checkbox"></th>
    <th><button class="btn btn-danger btn-sm" id="sel_button" name="sel_button"><i class="glyphicon glyphicon-trash" </i> Delete all selected</button></th>
  </tr>
</table>