Detailed explanation of how layui.js implements form verification function

This article mainly introduces the form verification function implemented by layui.js, and analyzes related operation skills such as event monitoring, verification, and judgment based on layui.js in the form of examples. Friends who need it can refer to it. I hope it can help everyone.

This example can be verified for text box, mobile phone, email, textarea and other formats

First introduce the following file:

<script src="layui/layui.js"></script>
<script src="layui/lay/dest/layui.all.js"></script>
<link rel="stylesheet" href="layui/css/layui.css" rel="external nofollow" rel="external nofollow" >

HTML code:

<form class="layui-form" action="">
 <p class="layui-form-item">
  <label class="layui-form-label">反馈主题</label>
  <p class="layui-input-block">
   <input name="title" class="layui-input" type="text" placeholder="请输入标题" autocomplete="off" lay-verify="title">
  </p>
 </p>
 <p class="layui-form-item">
  <label class="layui-form-label">姓名</label>
  <p class="layui-input-block">
   <input name="fname" class="layui-input" type="text" placeholder="请输入姓名" autocomplete="off" lay-verify="fname">
  </p>
 </p>
 <p class="layui-form-item">
  <label class="layui-form-label">手机</label>
  <p class="layui-input-block">
   <input name="phone" class="layui-input" type="tel" autocomplete="off" placeholder="请输入手机" lay-verify="phone">
  </p>
 </p>
 <p class="layui-form-item">
  <label class="layui-form-label">邮箱</label>
  <p class="layui-input-block">
   <input name="email" class="layui-input" type="text" autocomplete="off" placeholder="请输入邮箱" lay-verify="email">
  </p>
 </p>
 <p class="layui-form-item">
  <label class="layui-form-label">单选框</label>
  <p class="layui-input-block">
   <input name="sex" title="男" type="radio" checked="" value="男">
   <input name="sex" title="女" type="radio" value="女">
   <input name="sex" title="保密" type="radio" value="密">
  </p>
 </p>
 <!--<p class="layui-form-item layui-form-text">
  <label class="layui-form-label">普通文本域</label>
  <p class="layui-input-block">
   <textarea class="layui-textarea" placeholder="请输入内容">请输入内容</textarea>
  </p>
 </p>-->
 <p class="layui-form-item layui-form-text">
  <label class="layui-form-label">内容</label>
  <p class="layui-input-block">
   <textarea class="layui-textarea layui-hide" name="contact" id="LAY_demo_editor" lay-verify="contact"></textarea>
  </p>
 </p>
 <p class="layui-form-item">
  <p class="layui-input-block">
   <button class="layui-btn" lay-filter="demo2" lay-submit="">跳转式提交</button>
   <button class="layui-btn" lay-filter="demo1" lay-submit="">立即提交</button>
   <button class="layui-btn layui-btn-primary" type="reset">重置</button>
  </p>
 </p>
</form>

js verification code

<script>
layui.use([&#39;form&#39;, &#39;layedit&#39;, &#39;laydate&#39;], function(){
 var form = layui.form()
 ,layer = layui.layer
 ,layedit = layui.layedit
 ,laydate = layui.laydate;
 //自定义验证规则
 form.verify({
    title: function(value){
     if(value.length < 5){
      return &#39;标题至少得5个字符啊&#39;;
     }
    }, fname: function(value){
     if(value.length < 4){
      return &#39;请输入至少4位的用户名&#39;;
     }
    }, contact: function(value){
     if(value.length < 4){
      return &#39;内容请输入至少4个字符&#39;;
     }
    }
    ,phone: [/^1[3|4|5|7|8]\d{9}$/, &#39;手机必须11位，只能是数字！&#39;]
    ,email: [/^[a-z0-9._%-]+@([a-z0-9-]+\.)+[a-z]{2,4}$|^1[3|4|5|7|8]\d{9}$/, &#39;邮箱格式不对&#39;]
 });
 //创建一个编辑器
 layedit.build(&#39;LAY_demo_editor&#39;);
 //监听提交
 form.on(&#39;submit(demo1)&#39;, function(data){
  layer.alert(JSON.stringify(data.field), {
   title: &#39;最终的提交信息&#39;
  })
  return false;
 });
});
</script>

The complete sample code is as follows:

 

 反馈主题
 

  
 
 

 

 姓名
 

  
 
 

 

 手机
 

  
 
 

 

 邮箱
 

  
 
 

 

 单选框
 

  
  
  
 
 

 
 

 内容
 

  
 
 

 

 

  跳转式提交
  立即提交
  重置
 
 


<script>
layui.use([&#39;form&#39;, &#39;layedit&#39;, &#39;laydate&#39;], function(){
 var form = layui.form()
 ,layer = layui.layer
 ,layedit = layui.layedit
 ,laydate = layui.laydate;
 //自定义验证规则
 form.verify({
    title: function(value){
     if(value.length < 5){
      return &#39;标题至少得5个字符啊&#39;;
     }
    }, fname: function(value){
     if(value.length < 4){
      return &#39;请输入至少4位的用户名&#39;;
     }
    }, contact: function(value){
     if(value.length < 4){
      return &#39;内容请输入至少4个字符&#39;;
     }
    }
    ,phone: [/^1[3|4|5|7|8]\d{9}$/, &#39;手机必须11位，只能是数字！&#39;]
    ,email: [/^[a-z0-9._%-]+@([a-z0-9-]+\.)+[a-z]{2,4}$|^1[3|4|5|7|8]\d{9}$/, &#39;邮箱格式不对&#39;]
 });
 //创建一个编辑器
 layedit.build(&#39;LAY_demo_editor&#39;);
 //监听提交
 form.on(&#39;submit(demo1)&#39;, function(data){
  layer.alert(JSON.stringify(data.field), {
   title: &#39;最终的提交信息&#39;
  })
  return false;
 });
});
</script>

The running effect is as follows:

Related recommendations:

jquery form validation plug-in

AngularJs form validation method

Implementing form validation in JavaScript

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