Click the refresh button only to change the main part, navigation bar and sidebar do not change how to achieve?
< template >< div id= "app" > in
app.VUE
<router-view v-if="isRouterAlive"></router-view>
<!-- <router-view></router-view> -->
 < / div > 
 < / template > 
 < script > 
 export default {
 name: "App", 
 provide () {
return {
  reload: this.reload
}
}, 
 data () {
return {
  isRouterAlive:true
}
}, 
 methods: {
reload() {
  this.isRouterAlive = false
  this.$nextTick(function(){
    this.isRouterAlive = true
  })
}
} 
} 
 < / script > 
 export default {
 inject: ["reload"], 
data () {
return {
},
    
handleRefres() {
  this.reload()
    
 
},
						