Js reference problem

encountered a problem in the development process, which is a little strange why output [] instead of"

Mar.11,2021

your an is a variable declared in the scope of the function

const aa = (a)=>{ //a=a a
a=''//a
}
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-64f5-7bff36-16253.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-7bff36-16253.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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