直接上代碼
.layui-form-label.layui-required:after{
content:"*";
color:red;
position: absolute;
top:5px;
left:15px;
}
<div class="layui-form">
<div class="layui-form-item">
<label class="layui-form-label layui-required">消息標題:</label>
<div class="layui-input-block">
<input type="text" name="name" autocomplete="off" placeholder="請輸入消息標題" class="layui-input">
</div>
</div>
</div>
效果