父组件菜单栏选项卡与子组件选中tab选项卡绑定

一、父组件

<template>
  <div class="page_six">
    <el-menu
      :default-active="activeIndex"
      class="menu_header"
      mode="horizontal"
      @select="handleSelect"
    >
      <template v-for="item in tabMenuList" :key="item.id">
        <el-menu-item v-if="!item.children" :index="item.id">{{
          item.label
        }}</el-menu-item>
        <el-sub-menu v-else :index="item.id">
          <template #title>{{ item.label }}</template>
          <el-menu-item
            v-for="cItem in item.children"
            :key="cItem.id"
            :index="cItem.id"
            >{{ cItem.label }}</el-menu-item
          >
        </el-sub-menu>
      </template>
    </el-menu>
    <div class="content_box">
      <template v-if="showFlag == '1'">11111</template>
      <template v-if="showFlag == '2'">
       22222
      </template>
      <template v-if="showFlag == '3'">333333</template>
      <template v-if="showFlag == '4'"><ComTwo :choseTab="choseTab"/></template>
    </div>
  </div>
</template>

<script lang="ts">
import {
  defineComponent,
  nextTick,
  onMounted,
  reactive,
  ref,
  toRefs,
} from "vue";
import $ from "jquery";
import pageFourTs from "../dataJson/pageFourData";
import ComTwo from "@/components/comTwo.vue";
export default defineComponent({
  name: "pageSix",
  components: {
    ComTwo,
  },
  setup() {
    const activeIndex = ref("1");
    const { pageFourState } = pageFourTs();
    const state = reactive({
      tabMenuList: [] as any,
      showFlag: "1",
      menuChose: "1",
      choseTab:'4-1'
    });
    function handleSelect(data: string) {
      state.showFlag = data;
      state.menuChose = data;
      state.choseTab = data; // 控制子组件的选项卡
      const showReg = RegExp(/\d-\d/g);
      if (data.match(showReg)) {
        state.showFlag = data.slice(0, 1);
      }
    }
    onMounted(() => {
      nextTick(() => {
        state.tabMenuList = pageFourState.tabMenuList;
      });
    });
    return {
      ...toRefs(pageFourState),
      ...toRefs(state),
      activeIndex,
      handleSelect,
    };
  },
});
</script>

<style lang="scss">
.page_six {
  width: 100%;
  height: 100%;
}
.content_box {
  height: 695px;
  overflow: auto;
}
</style>

二、子组件comTwo.vue

<template>
  <div class="com_two">
    <el-tabs
      :tab-position="tabPosition"
      v-model="editableTabsValue"
      style="height: 200px"
    >
      <el-tab-pane label="用户管理" name="4-1">用户管理</el-tab-pane>
      <el-tab-pane label="配置管理" name="4-2">配置管理</el-tab-pane>
      <el-tab-pane label="角色管理" name="4-3">角色管理</el-tab-pane>
      <el-tab-pane label="定时任务补偿" name="4-4">定时任务补偿</el-tab-pane>
    </el-tabs>
  </div>
</template>

<script lang="ts">
import {
  computed,
  defineComponent,
  nextTick,
  reactive,
  Ref,
  toRefs,
  watch,
} from "vue";
export default defineComponent({
  name: "comTwo",
  props: {
    choseTab: {
      type: String,
      defalult: "4-1",
    },
  },

  setup(props) {
    const state = reactive({
      editableTabsValue: "4-1",
      tabPosition: "left",
    });
    // 监听choseTab的改变
    const choseTabChange: Ref = computed(() => {
      return props.choseTab;
    });
    watch(
      choseTabChange,
      () => {
        nextTick(() => {
          state.editableTabsValue = choseTabChange.value;
        });
      },
      {
        immediate: true,
      }
    );
    return {
      ...toRefs(state),
    };
  },
});
</script>

<style lang="scss">
.com_two {
  margin-bottom: 20px;
}
</style>

三、效果展示描述：

比如：点击菜单栏 配置管理，会自动切换到子组件的配置管理菜单