官网顶部导航分为一级导航和二级导航

导航的样子

文件的层级

router 文件层级

header 组件代码

<h1 class="logo-wrap">
          <router-link to="/">
            <img class="logo" :src="$config.company.logo" alt="" />
            <img class="sub-logo" :src="$config.company.subLogo" alt="" />
          </router-link>
        </h1>
        <!-- 导航 -->
        <div class="menu-wrap">
          <ul>
            <!-- 一级 -->
            <li
                v-for="(item, index) in menus"
                @click="handle(index)"
                :class="{ active: index == menuIndex }"
                class="menu-item"
                v-if="$isNull(item.meta.isMenuHide)">
              <a href="javascript:;" class="a" @click="menuClick(item.path)">{{
                item.meta.title
              }}</a>
              <!-- 二级 -->
              <span class="child-menu-group" v-if="!item.meta.isChildMenuHide">
                <span
                      class="chil-item"
                      v-for="(childItem, childIndex) in item.children"
                      v-if="$isNull(childItem.meta.isMenuHide)">
                  <a
                     href="javascript:;"
                     class="child-a"
                     @click="menuClick(childItem.path)">{{ childItem.meta.title }}</a>
                </span>
              </span>
            </li>
          </ul>
        </div>

js 、css

 .logo-wrap {
    float: left;

    .logo,
    .sub-logo {}

    .sub-logo {
      display: inline-block;
      margin-left: 5px;
      padding-left: 5px;
      border-left: 1px #ffffff40 solid;
    }
  }  

.menu-wrap {
    float: right;

    .menu-item.active {
      &:before {
        position: absolute;
        content: "";
        bottom: 0;
        left: 50%;
        width: 30px;
        transform: translate3d(-50%, 0, 0);
        border-bottom: 2px #ffffff solid;
      }
    }

    li {
      position: relative;
      display: inline-block;

      &.active {}

      .a {
        display: block;
        padding: 15px 20px;
        color: #fff;
        font-size: 16px;
      }

      .child-menu-group {
        display: none;
        position: absolute;
        left: -30px;
        min-width: 160px;
        padding: 5px 0;
        background-color: #ffffff;
        border-radius: 6px;
        text-align: center;
        box-shadow: 0 0 4px rgba(0, 0, 0, 0.2);

        &:before {
          position: absolute;
          content: "";
          top: -6px;
          left: 50%;
          margin-left: -6px;
          width: 0;
          height: 0;
          border-left: 4px solid transparent;
          border-right: 4px solid transparent;
          border-bottom: 8px solid #ffffff;
        }

        .chil-item {
          position: relative;
          display: block;

          &::after {
            position: absolute;
            z-index: 1;
            top: 0;
            left: 0;
            content: "";
            height: 100%;
            width: 0;
            background-image: @background-image;
          }

          @keyframes childItem {
            0% {
              width: 0;
            }

            100% {
              width: 100%;
            }
          }

          &:hover {
            &::after {
              animation: childItem 0.2s ease-out;
              width: 100%;
            }

            a {
              color: #ffffff;
            }
          }
        }

        .child-a {
          display: block;
          position: relative;
          z-index: 2;
          padding: 10px 0;
        }
      }

      &:hover {
        .child-menu-group {
          display: block;
        }
      }
    }
  }

 data() {
    return {
      menus: [],
      menuIndex: 0,
      isMenuDrawer: false,
      isMenuFixed: false
    };
  },
  created() {
    this.menus = this.$router.options.routes[1].children;
    console.log( this.menus)
    this.findRouter(this.$route.path);
    this.resetPath(this.$route.path);
  },
  mounted() {
    this.onScroll();
  },
  watch: {
    //监听路由变化
    $route(to, from) {
      this.isMenuFixed = false;
      this.resetPath(to.path);
      this.findRouter(to.path);
    }
  },
  methods: {
    findRouter(path) {
      var i = path.indexOf("/", 1);
      var pathTo = "";
      if(i == -1) {
        pathTo = path;
      } else {
        pathTo = path.substring(0, i);
      }
      var list = this.menus;
      var index = list.findIndex((item, index) => {
        return pathTo == item.path;
      });
      this.menuIndex = index;
      document.title = this.menus[this.menuIndex].meta.title
    },
   
    // 二级菜单移动端
    menuSwitch() {
      this.isMenuDrawer = true;
    },
    // 点击菜单
    menuClick(path) {
      this.isMenuDrawer = false;
      this.$router.push(path);
    },
    // 导航切换
    handle(index) {
      this.isMenuDrawer = false;
      this.menuIndex = index;
      document.title = this.menus[this.menuIndex].meta.title
    },
    //获取页面路由，导航添加active
    resetPath(path) {
      var _menus = this.menus;
      for(var i in _menus) {
        if(_menus[i].path == path) {
          this.menuIndex = i;
          // 设置标题
          document.title = _menus[i].meta.title;
        }
      }
    }
}