How to write vue.js watch listeners in decorative mode?

clipboard.png
because listening is an object, it is less common.
how should the code in the red box in the picture be written in vue-property-decorator mode? Thank you!
@ Watch ("columns", {deep:true})
onColumns () {

this.cloneColumns=this.makeColumns()

} is this correct?

Nov.29,2021

https://github.com/kaorun343/.

Brothers don't read the documents?

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-64f5-1b3daac-2c394.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3daac-2c394.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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