js form verification example analysis_javascript skills

The example in this article describes the method of form verification using js. Share it with everyone for your reference. The specific implementation method is as follows:

1. Traditional form validation code

Copy code The code is as follows:

 
 
 
 
 
 
 
 

Email:
                                                                           

Password:

Re-enter password:

Name:

                                                                      

2. Form verification with prompt information behind the input box

Copy code The code is as follows:

 
 
 
 
 
 
 
 
 

 
     

 
           Email: 
     

    
     

 
           密码: 
     

 
     

 
          重输密码: 
     

 
     

 
          姓名： 
     

 
     

 
           
     

 
 

 
 

效果图如下所示：

3. 在输入框失去焦点时触发校验函数

复制代码 代码如下:

 
 
 
 
 
 
 
 
 

 
     

 
           Email: 
     

    
     

 
           密码: 
     

Re-enter password:

Name:

                                                                      

The rendering is as follows:

I hope this article will be helpful to everyone’s JavaScript programming design.

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