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<template>
    <div id="app">
        <router-view v-if="isRouterAlive"></router-view>
    </div>
</template>
<script>
    export default {
        name: 'App',
        provide () {    //父组件中通过provide来提供变量，在子组件中通过inject来注入变量。                                             
            return {
                reload: this.reload                                              
            }
        },
        data() {
            return{
                isRouterAlive: true
            }
        },
        methods: {
            reload () {
                this.isRouterAlive = false;
                this.$nextTick(function () {
                    this.isRouterAlive = true;      //再打开
                }) 
            }
        }
    }
</script>