Questions about vue $root

do you gods know the usage and examples related to $root of vue? Ask for a recommendation, but I really won"t.

Root vue.js
Mar.05,2021

https://www.cnblogs.com/bug-m.

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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-64f5-1b36198-2b763.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b36198-2b763.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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