layui表单验证

<form class="layui-form" action="">
 <div class="layui-form-item">
 <div class="layui-input-block">
  <input name="title" class="layui-input" type="text" placeholder="请输入" autocomplete="off" lay- verify="required">
 </div>
 </div>
 <div class="layui-form-item">
 <div class="layui-input-block">
  <button class="layui-btn" lay-filter="demo1" lay-submit="">提交</button>
 </div>
 </div>

</form>

主要是上面的几个点