組件的通信 ：provide / inject [https://juejin.im/book/5bc844166fb9a05cd676ebca/section/5bc845435188255c533655f4](https://juejin.im/book/5bc844166fb9a05cd676ebca/section/5bc845435188255c533655f4) 在父頁面router-view使用v-if="isRefresh"控制顯示隱藏 ``` <router-view v-if="isRefresh"></router-view> ``` data定義 ``` isRefresh: true ``` methods中定義 ``` refresh () { this.isRefresh = false this.$nextTick(function () { this.isRefresh = true }) } ``` 在methods同級定義provide ``` provide () { return { refresh: this.refresh } }, ``` 在需要刷新的頁面使用inject注入refresh方法，inject和methods同級 ``` inject: ['refresh'] ```