vue is an instance of determining whether the page is first entered or refreshed again

I won't talk too much, let's just look at the code ~

<template>
  <div>
    Determine whether the page is entered for the first time or refreshed again 
  </div>
</template>
 
 <script>
export default {
  data(){
    return{
       
       }
    },
 
  mounted () {
   // No. 1 1 Methods 
   // if(window.name == ""){
   // console.log(" Loaded for the first time ");
   // window.name = "isReload"; //  When we first enter the page, we can give window.name Settings 1 Fixed value  
   // }else if(window.name == "isReload"){
   // console.log(" Page is refreshed ");
   // }
   // No. 1 2 Methods 
   if (window.performance.navigation.type == 1) {
    console.log(" Page is refreshed ")
   }else{
    console.log(" Loaded for the first time ")
   }
  },
 
  methods: {
   
  },
 
  }
</script> 

<style scoped> 
</style>

Supplementary knowledge: VUE-Router is the same as page 1 for the second time and does not refresh the problem and several solutions

Recently, I just encountered a problem. I modified the user's avatar and then entered the user's homepage. I found that even if the data changed after the change. . The page will not be rendered again. . .

The following centralized solutions are provided for your reference:

1. You can define a parameter in the refreshed page, so that different pages will be rendered every time:

route Instantiation Naming Configuration:

{
      //  User information 
      path: '/accountDetail/:randKey',
   name: 'accountDetail',
   component: accountDetail,
   meta: {requiresAuth: true}
 },

Jump location configuration:

var chars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
 var maxLength = 15;
    var res = '_jsonpphotochange';
    for (var i = 0; i < maxLength; i++) {
      var id = Math.ceil(Math.random() * 35);
      res += chars[id];
    }
    // res  Is a random string , Here are the jumps: 
 this.$router.push('/accountDetail/' + paramsAccount);

2. You can make the global pages overloaded. This is more ruthless and redundant. Use it carefully:

Modified under App. vue:

<template>
 <div id="app" class="app">
  <transition :key="key">
  <router-view class="router-view"></router-view>
  </transition>
 </div>
 </template>
 <script type="text/ecmascript-6">
 // import {mapState} from 'vuex';
 export default {
  name: 'app',
  computed: {
  key() {
   return this.$route.name !== undefined ? this.$route.name + new Date() : this.$route + new Date();
  }
  }
 };
 </script>
//  Is in template Downward addition 1 To label <transition></transition>  Plus key The attribute, but official website said   Use this to prevent reuse of components   This method is recommended. 

3. watch to detect route changes. . The disadvantage is that sometimes it happens inexplicably twice, that is, you have to jump twice. . Some people say that when you come in, you will perform a jump and go back to perform a jump, but I don't think it is very similar. . I hope someone can give me some advice. .

watch: {
 '$route' (to, from) {
  this.httpGetUserInfo(); //  This is me ajax Method of obtaining user information 
 }
 }
 //  In this way, this method will be run every time the route is executed, 1 It won't run after opening it again, you need to use created() Method to execute the following ajax Method.