<template>
 <div id="app">
  <router-view v-if="isRouterAlive" />
 </div>
</template>

<script>
export default {
 name: 'App',
 data() {
  return {
   isRouterAlive: true
  }
 },
 provide() {
  return {
   reload: this.reload
  }
 },
 methods: {
  reload() {
   this.isRouterAlive = false
   this.$nextTick(() => {
    this.isRouterAlive = true
   })
  }
 }
}
</script>

 export default {
  name: 'orderAndRandom',
  
  // 就是下面这行
  inject: ['reload'],
  data() {},
  
  // 省略
 }