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1.  router -> index.ts 文件：

import { createRouter, createWebHistory } from 'vue-router'
import DefaultView from '@/views/default/index.vue'
import ParentView from '@/views/parent/index.vue'
import ChildView from '@/views/child/index.vue'const router = createRouter({history: createWebHistory(import.meta.env.BASE_URL),routes: [{path: '/',name: 'Default',component: DefaultView},{path: '/parent',name: 'parent',component: ParentView,children: [{path: 'child',name: 'child',component: ChildView}]}]
})export default router

2、父路由 ParentView 对应的 index.vue 界面

<template><div><span>父路由界面</span><!-- 下面 route-view 是子路由承载标签 --><router-view></router-view></div>
</template>
<script setup lang="ts">
import { onMounted, provide } from 'vue'//使用 provide 方法向子路由公开 CallParent 方法
provide('CallParent', (data: any) => {console.log('成功调用了父路由方法');
})onMounted(() => {//父路由界面元素加载完毕
})
</script>

3、子路由 ChildView 对应的 index.vue 界面

<template><div><span>子路由界面</span></div>
</template>
<script setup lang="ts">
import { onMounted, inject } from 'vue'//使用 inject 获取到父路由公开 CallParent 方法
let parentMethod: (data: any) => {} = inject('CallParent')onMounted(() => {//调用父路由中的方法parentMethod('hello world!')
})
</script>