<!DOCTYPE html>
    <html>
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
      <title>开始使用Layui</title>
    <link rel="stylesheet" type="text/css" href="__STATIC__/layui/css/layui.css">

    </head>
    <body>
<form class="layui-form" method="POST" action="{:U('add')}">
  <div class="layui-form-item">
    <label class="layui-form-label">输入框</label>
    <div class="layui-input-block">
      <input type="text" name="title"  required lay-verify="username" placeholder="请输入标题" autocomplete="no" class="layui-input">
    </div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label">密码框</label>
    <div class="layui-input-inline">
      <input type="password" name="password" required lay-verify="required" placeholder="请输入密码" autocomplete="off" class="layui-input">
    </div>
    <div class="layui-form-mid layui-word-aux">辅助文字</div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label">选择框</label>
    <div class="layui-input-block">
      <select name="city" lay-verify="required">
        <option value=""></option>
        <option value="0">北京</option>
        <option value="1">上海</option>
        <option value="2">广州</option>
        <option value="3">深圳</option>
        <option value="4">杭州</option>
      </select>
    </div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label">复选框</label>
    <div class="layui-input-block">
      <input type="checkbox" name="like[write]" title="写作">
      <input type="checkbox" name="like[read]" title="阅读" checked>
      <input type="checkbox" name="like[dai]" title="发呆">
    </div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label">开关</label>
    <div class="layui-input-block">
      <input type="checkbox" name="switch" lay-skin="switch">
    </div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label">单选框</label>
    <div class="layui-input-block">
      <input type="radio" name="sex" value="男" title="男">
      <input type="radio" name="sex" value="女" title="女" checked>
    </div>
  </div>
  <div class="layui-form-item layui-form-text">
    <label class="layui-form-label">文本域</label>
    <div class="layui-input-block">
      <textarea name="desc" placeholder="请输入内容" class="layui-textarea"></textarea>
    </div>
  </div>
  <div class="layui-form-item">
    <div class="layui-input-block">
      <button class="layui-btn" lay-submit lay-filter="formDemo">立即提交</button>
      <button type="reset" class="layui-btn layui-btn-primary">重置</button>
    </div>
  </div>
</form>
    </body>
    </html>
      <script src="__STATIC__/layui/lay/dest/layui.all.js"></script>  
    <script>
    ;!function(){
      

      //当使用了 layui.all.js,无需再执行layui.use()方法
      var from = layui.form(),layer = layui.layer;

              from.verify({
              username: function(value, item){ //value:表单的值、item:表单的DOM对象
                if(value==""){
                 return '用户名不能为空';   
                }
                if(!new RegExp("^[a-zA-Z0-9_\u4e00-\u9fa5\\s·]+$").test(value)){
                  return '用户名不能有特殊字符';
                }
                if(/(^\_)|(\__)|(\_+$)/.test(value)){
                  return '用户名首尾不能出现下划线\'_\'';
                }
                if(/^\d+\d+\d$/.test(value)){
                  return '用户名不能全为数字';
                }

              }
              
              //我们既支持上述函数式的方式,也支持下述数组的形式
              //数组的两个值分别代表:[正则匹配、匹配不符时的提示文字]
              ,pass: [
                /^[\S]{6,12}$/
                ,'密码必须6到12位,且不能出现空格'
              ] 
            });
    }();
    </script>