How does nodejs design the invitation code to confirm the relationship between the invitee and the invitee?

the invitee opens the web page by connecting:
clipboard.png
to generate a unique query string. How does the interface get this code value when the user registers and how does it match the inviter?

Redis mongodb node.js javascript
Mar.13,2021
  1. how did code come from? Does it have something to do with the inviter ID
  2. nodejs directly gets the query string to get code, and then gets the inviter ID according to step 1

each user has an ID, that can be used to generate a sequence, such as mad5, etc., and can be used when inviting people to generate a connection

Previous: Why can't I pass parameters to setState () here?

Next: Countdown problem. 00 problem.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32725-4ea7b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32725-4ea7b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?