非数组 对象

computed:{
	haha () {
		return this.$store.state.msg
	}
},
watch:{
	haha：function (newVal, oldVal) {
		//插入需要在仓库数据变化时做的逻辑处理
	}
}

数组对象

computed:{
		groupFirst(){
				return this.$store.state.group[0].id;
			}
},
watch: {
	groupFirst: {
		handler(newVal, oldVal) {
			this.appGroup = newVal;
		},
		deep: true
	}
},