This is normal for viewing the returned data in the browserThe callback function in AJAX is not running?
I also want to use 2.0, and there is a verification code, how great
Your ajax is not set to jump to the login page.
This is normal for viewing the returned data in the browser
The callback function in AJAX is not running? 
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
I also want to use 2.0, and there is a verification code, how great
Your ajax is not set to jump to the login page.