element-ui中點選菜單,改變目前菜單背景顔色

element-ui中點選菜單,改變目前菜單背景顔色

需求: vue項目中,點選左側菜單,tags頁顯示目前打開的菜單,并且高亮顯示目前菜單

實作效果:

實作代碼:在vuex裡面定義tags存放所有打開的菜單,和目前打開的索引curtagsIndex:,通過周遊tags,看是否等于目前索引

1.在store的index.js檔案裡面定義 tags 和 curtagsIndex

const store = new Vuex.Store({
    modules: {
    tags:[],
    curTagsIndex:"-1",
    },
  mutations: {
    SET_CURTAGS: (state, index) => {
      state.curTagsIndex = index
    },
  }
})  
           

<div class="tag_list" v-for="(tag,index)  in  tags" @click="jump(tag)" :class="{ active:curTagsIndex == index}">
        <span>{{tag.name}}</span>
        <i class="el-icon-close" @click="close(tag)"></i>
</div>

<script>
  import { mapState, mapGetters,mapMutations } from "vuex";
    export default{   
      computed: {
        ...mapGetters(["tags","curTagsIndex"]),
      },
      methods:{
        ...mapMutations(["SET_CURTAGS"]),
        jump(val){
          this.$router.push(val.path);
          this.tags.forEach((item,index)=>{
             if(item.name==val.name){
               this.$store.commit("SET_CURTAGS",index);
            }
          })

        },
      
      },
        
    }
</script>
<style  scoped>
 
  .active{
     background:#f1f4f5;

  }

</style>