How element-ui select components get cascading data! Not through a fixed array, but from a database or API

how the Select selector or Cascader cascade selector cascades the output after a selector gets the selected data from the database or API JSON. How to use AIOS

Jan.25,2022
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-64f5-1b3bc98-3468b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3bc98-3468b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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