P19.vue3提供和注入

App.vueHomeView.vueContent.vue<script>importHelloKugoufrom"./HelloKugou.vue";exportdefault{data(){//让每个组件对象返回一个不污染数据的对象return{};},components:{HelloKugou},methods:{},name:"Content"}HelloKugou.vueHelloKugou的HomeView组件HelloKugou的祖父组件获取HomeView组件的messageProvide和Inject类似于propresponsiveApp.vueHomeView.vueContent.vueHelloKugou.vue函数响应HomeView.vueHelloKugou.vue