layui/example/src/view/component.vue

<template>
  <lay-layout>
    <lay-side>
      <lay-scroll style="overflow-y: scroll">
        <ul class="layui-menu layui-menu-lg layui-menu-docs">
          <li
            v-for="menu in menus"
            :key="menu"
            class="layui-menu-item-group"
            lay-options="{type: 'group', isAllowSpread: true}"
          >
            <div class="layui-menu-body-title">{{ menu.title }}</div>
            <hr />
            <ul>
              <li
                v-for="children in menu.children"
                :key="children"
                :class="[
                  currentPath === children.path
                    ? 'layui-menu-item-checked2'
                    : '',
                ]"
                @click="handleClick(children)"
              >
                <div class="layui-menu-body-title">
                  <router-link :to="children.path">
                    <span>{{ children.title }}</span>
                    <span class="layui-font-12 layui-font-gray">
                      {{ children.subTitle }}
                    </span>
                  </router-link>
                </div>
              </li>
            </ul>
          </li>
        </ul>
      </lay-scroll>
    </lay-side>
    <lay-body>
      <div
        style="
          padding: 20px;
          margin-right: 180px;
          transition: margin 240ms 60ms;
        "
      >
        <router-view />
      </div>
    </lay-body>
  </lay-layout>
</template>
<script>
import { ref, watch } from "vue";
import { useRouter, useRoute } from "vue-router";
import menus from "./utils/menus";
export default {
  setup() {
    const route = useRoute();
    const router = useRouter();
    const currentPath = ref("/zh-CN/guide");

    watch(
      () => route.path,
      (val) => {
        currentPath.value = val;
      },
      {
        immediate: true,
        deep: true,
      }
    );

    const selected = ref(1);

    const handleClick = function (menu) {
      selected.value = menu.id;
      router.push(menu.path);
    };

    return {
      menus,
      selected,
      currentPath,
      handleClick,
    };
  },
};
</script>