Vue.js refs's is a VueComponent,. So how do I get his height?

vue.js refs is a VueComponent, so how do I get his height?
ordinary tag, just use style.height, how to get VueComponent?


mounted(){
 getComputedStyle(this.$refs.xxx.$el).height   
}
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-64f5-1b30ca4-4e9a8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30ca4-4e9a8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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