Detailed explanation of the error reported when the post method returns in Ajax

This time I will bring you a detailed explanation of the error reported when the post method returns in Ajax. What are theprecautionswhen dealing with the error reported when the post method returns in Ajax. The following is a practical case, let's take a look.

This is the Node.js server

$(".reg_code_btn").click(function(e){ $(e.target).parent().children().first().val() $.ajax({ type:"POST", url:"validate/vcode", dataType:"json", data:{ vcode:"code" }, success:function(data){ console.log(data); alert(data); }, error:function(data){ console.log(data); alert("发生错误"); } }); });
        

        

        

        
调试结果如下：
        

         Copy after login
        
       

object objectall have the same commonality:

starts with 0

How to communicate data between C and View

What are the front-end and back-end types? ajax interaction method

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