What does the front end do with concurrent requests?

as mentioned above, how to implement concurrent requests

Http ajax javascript
Jun.10,2022

use asynchronous Prmosie or web worker

front-end asynchronous operations can be concurrent! Requests like js css img are concurrent!

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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-64f5-1bd5745-307c3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bd5745-307c3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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