• vuetifyのチェックボックスを一括で制御する方法

<v-checkbox 
  ref="n"
  v-model="selected[n]"
></v-checkbox>


select_All(e){
        if(e == true)
        {
          this.$refs.n.forEach((val, index) => this.selected[index] = true)
        } else {
            this.$refs.n.forEach((val, index) => this.selected[index] = false)
        }
    }

https://stackoverflow.com/questions/57752095/how-to-check-all-checkbox-on-checking-one-checkbox-in-vuetify