Just joined the job, want to know before other people's development of things, before the code using the old syntax development, then I want to use es6 syntax development how to do?

Development problems encountered now

Es6
Jul.01,2022

introduce babel of es6

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-64f5-1e6fd58-46043.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e6fd58-46043.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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