What happens when a page has an upgrade protocol plus a lot of polling, when the protocol is downgraded?

here"s the thing

A page has two left and right blocks
the left side is connected to the socket line, and the right side is in the polling data

when the socket on the left is broken, the data in polling on the right will be unable to request data all the time
Open dev tool and see the header refer-when-downgrade

I would like to ask if there are any buddies who have done any research on this? The relevant experience of this cooperation can not be found on the Internet

Upgrade html5 javascript websocket socket
Mar.07,2021

Previous: How does Node.js get the value of the out parameter after executing the mysql stored procedure with the out parameter?

Next: Weex is integrated into existing applications, how to deal with the navigation bar?

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-64f5-43735a0-5199.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-43735a0-5199.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?