动态修改el-tag的type属性

想要实现点击按钮，切换按钮类型的同时，更改数据

data(){
return{
currentType:'',
environmentType:[1,2,3],
}
},

<el-tag :type="buttonType(index)" v-for="(type,index) in environmentType" :key="index"  @click.native="selectType(index)">{{type}}</el-tag>

buttonType(index){
// 选中的button更改颜色，其余的都更改为灰色
        if(index === this.currentType){
          return "success"
        }else{
          return "info"
        }
      },

selectType(val){
	this.currentType = val
	this.buttonType(val)
},