Vue2.0 实现单选互斥的方法

<template> 
  <dd @click="changeCategory(currCourseFirst.categoryId)" 
        v-for="currCourseFirst in currCourse.currCourseFirst" 
        :key="currCourseFirst.categoryId" 
        :class="resultCategoryId === currCourseFirst.categoryId ? 'active': ''" >
          {{currCourseFirst.name}}
  </dd>
</template>

<script>
  export default{
    data() {
      return {
        categeryId: this.$route.query.categoryId,
        typeId: this.$route.query.typeId
      }
    },
    methods: {
      changeCategoryId(categoryId) {
        this.categoryId = categoryId
      }
    },
    puted: {
      resultCategoryId(){
        return this.categoryId
      }
    }
  }
</script>