在跟着写尚品汇三级联动路由跳转的时候遇到这个问题，就是在我点击商品跳转的时候，路由会跳转并且一瞬间回到home，浏览器会刷新。代码如下：

<!--  -->
<template>
    <!-- 商品分类导航 -->
    <div class="type-nav">
        <div class="container">
            <h2 class="all">全部商品分类</h2>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
            <div class="sort">
                <div class="all-sort-list2" @click="goSearch">
                    <div class="item" v-for="(c1,index)  in categoryList" :key="c1.categoryId">
                        <h3>
                            <a href="" :data-categoryName="c1.categoryName"
                               :data-category1Id="c1.categoryId">{{ c1.categoryName }}</a>
                        </h3>
                        <div class="item-list clearfix">
                            <div class="subitem" v-for="(c2,index) in c1.categoryChild" :key="c2.categoryId">
                                <dl class="fore">
                                    <dt>
                                        <a href="" :data-categoryName="c2.categoryName"
                                           :data-category2Id="c2.categoryId">{{ c2.categoryName }}</a>
                                    </dt>
                                    <dd>
                                        <em v-for="(c3,index) in c2.categoryChild" :key="c3.categoryId">
                                            <a href="" :data-categoryName="c3.categoryName"
                                               :data-category3Id="c3.categoryId">{{ c3.categoryName }}</a>
                                        </em>
                                    </dd>
                                </dl>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
    import {mapState} from 'vuex'

    export default {
        name: "TypeNav",
        data(){
          return {
              showSort:true
          }
        },
        mounted() {
            //通知vuex发请求，获取数据，存储在仓库
            this.$store.dispatch('categoryList');
            if(this.$route.path!='/home'){
                this.showSort=false
            }
        },
        methods: {
            goSearch(event) {
                let element = event.target;
                let {categoryname, category1id, category2id, category3id} = element.dataset;
                if (categoryname) {
                    let location = {name: 'search'};
                    let query = {categoryName: categoryname}

                    if (category1id) {
                        query.category1Id = category1id;
                    } else if (category2id) {
                        query.category2Id = category2id;
                    } else if (category3id) {
                        query.category3Id = category3id;
                    }
                    location.query = query;

                    console.log(location)
                    console.log(query)
                    this.$router.push(location)
                }
            }
        },
        computed: {
            ...mapState({
                categoryList: (state) => state.home.categoryList
            })
        }
    };
</script>
<style lang='less' scoped>
  .type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
      width: 1200px;
      margin: 0 auto;
      display: flex;
      position: relative;

      .all {
        width: 210px;
        height: 45px;
        background-color: #e1251b;
        line-height: 45px;
        text-align: center;
        color: #fff;
        font-size: 14px;
        font-weight: bold;
      }

      .nav {
        a {
          height: 45px;
          margin: 0 22px;
          line-height: 45px;
          font-size: 16px;
          color: #333;
        }
      }

      .sort {
        position: absolute;
        left: 0;
        top: 45px;
        width: 210px;
        height: 461px;
        position: absolute;
        background: #fafafa;
        z-index: 999;

        .all-sort-list2 {
          .item {
            h3 {
              line-height: 30px;
              font-size: 14px;
              font-weight: 400;
              overflow: hidden;
              padding: 0 20px;
              margin: 0;

              a {
                color: #333;
              }
            }

            .item-list {
              display: none;
              position: absolute;
              width: 734px;
              min-height: 460px;
              background: #f7f7f7;
              left: 210px;
              border: 1px solid #ddd;
              top: 0;
              z-index: 9999 !important;

              .subitem {
                float: left;
                width: 650px;
                padding: 0 4px 0 8px;

                dl {
                  border-top: 1px solid #eee;
                  padding: 6px 0;
                  overflow: hidden;
                  zoom: 1;

                  &.fore {
                    border-top: 0;
                  }

                  dt {
                    float: left;
                    width: 54px;
                    line-height: 22px;
                    text-align: right;
                    padding: 3px 6px 0 0;
                    font-weight: 700;
                  }

                  dd {
                    float: left;
                    width: 415px;
                    padding: 3px 0 0;
                    overflow: hidden;

                    em {
                      float: left;
                      height: 14px;
                      line-height: 14px;
                      padding: 0 8px;
                      margin-top: 5px;
                      border-left: 1px solid #ccc;
                    }
                  }
                }
              }
            }

            &:hover {
              .item-list {
                display: block;
              }
            }
          }
        }
      }
    }
  }
</style>

注意每一个<a>，因为偷懒我没有去掉href="",这样你点了<a>当然成了他的默认用法，跳转到/ ，而咱们已经在路由里面设置了默认路由为home,自然会跳转到home啦，所以去掉每一个<a>里面的href属性就好啦。

<!--  -->
<template>
    <!-- 商品分类导航 -->
    <div class="type-nav">
        <div class="container">
            <h2 class="all">全部商品分类</h2>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
            <div class="sort">
                <div class="all-sort-list2" @click="goSearch">
                    <div class="item" v-for="(c1,index)  in categoryList" :key="c1.categoryId">
                        <h3>
                            <a  :data-categoryName="c1.categoryName"
                               :data-category1Id="c1.categoryId">{{ c1.categoryName }}</a>
                        </h3>
                        <div class="item-list clearfix">
                            <div class="subitem" v-for="(c2,index) in c1.categoryChild" :key="c2.categoryId">
                                <dl class="fore">
                                    <dt>
                                        <a  :data-categoryName="c2.categoryName"
                                           :data-category2Id="c2.categoryId">{{ c2.categoryName }}</a>
                                    </dt>
                                    <dd>
                                        <em v-for="(c3,index) in c2.categoryChild" :key="c3.categoryId">
                                            <a  :data-categoryName="c3.categoryName"
                                               :data-category3Id="c3.categoryId">{{ c3.categoryName }}</a>
                                        </em>
                                    </dd>
                                </dl>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
    import {mapState} from 'vuex'

    export default {
        name: "TypeNav",
        data(){
          return {
              showSort:true
          }
        },
        mounted() {
            //通知vuex发请求，获取数据，存储在仓库
            this.$store.dispatch('categoryList');
            if(this.$route.path!='/home'){
                this.showSort=false
            }
        },
        methods: {
            goSearch(event) {
                let element = event.target;
                let {categoryname, category1id, category2id, category3id} = element.dataset;
                if (categoryname) {
                    let location = {name: 'search'};
                    let query = {categoryName: categoryname}

                    if (category1id) {
                        query.category1Id = category1id;
                    } else if (category2id) {
                        query.category2Id = category2id;
                    } else if (category3id) {
                        query.category3Id = category3id;
                    }
                    location.query = query;

                    console.log(location)
                    console.log(query)
                    this.$router.push(location)
                }
            }
        },
        computed: {
            ...mapState({
                categoryList: (state) => state.home.categoryList
            })
        }
    };
</script>
<style lang='less' scoped>
  .type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
      width: 1200px;
      margin: 0 auto;
      display: flex;
      position: relative;

      .all {
        width: 210px;
        height: 45px;
        background-color: #e1251b;
        line-height: 45px;
        text-align: center;
        color: #fff;
        font-size: 14px;
        font-weight: bold;
      }

      .nav {
        a {
          height: 45px;
          margin: 0 22px;
          line-height: 45px;
          font-size: 16px;
          color: #333;
        }
      }

      .sort {
        position: absolute;
        left: 0;
        top: 45px;
        width: 210px;
        height: 461px;
        position: absolute;
        background: #fafafa;
        z-index: 999;

        .all-sort-list2 {
          .item {
            h3 {
              line-height: 30px;
              font-size: 14px;
              font-weight: 400;
              overflow: hidden;
              padding: 0 20px;
              margin: 0;

              a {
                color: #333;
              }
            }

            .item-list {
              display: none;
              position: absolute;
              width: 734px;
              min-height: 460px;
              background: #f7f7f7;
              left: 210px;
              border: 1px solid #ddd;
              top: 0;
              z-index: 9999 !important;

              .subitem {
                float: left;
                width: 650px;
                padding: 0 4px 0 8px;

                dl {
                  border-top: 1px solid #eee;
                  padding: 6px 0;
                  overflow: hidden;
                  zoom: 1;

                  &.fore {
                    border-top: 0;
                  }

                  dt {
                    float: left;
                    width: 54px;
                    line-height: 22px;
                    text-align: right;
                    padding: 3px 6px 0 0;
                    font-weight: 700;
                  }

                  dd {
                    float: left;
                    width: 415px;
                    padding: 3px 0 0;
                    overflow: hidden;

                    em {
                      float: left;
                      height: 14px;
                      line-height: 14px;
                      padding: 0 8px;
                      margin-top: 5px;
                      border-left: 1px solid #ccc;
                    }
                  }
                }
              }
            }

            &:hover {
              .item-list {
                display: block;
              }
            }
          }
        }
      }
    }
  }
</style>

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