Detailed explanation of using ref steps in vue2

This time I will bring you a detailed explanation of the steps for using ref in vue2. What are the precautions for using ref in vue2. The following is a practical case, let's take a look.

This article introduces the specific use of ref in vue2 and shares it with everyone. The details are as follows.

1. Let’s first define two components

html part

  <p id="app">
   <navbar ></navbar>
   <pagefooter ></pagefooter>
  </p>

jsPart

  Vue.component('navbar',{
    template:'<p>{{navs}}</p>',
    data:function () {
     return {
      navs:1
     }
    }
   });
  Vue.component('pagefooter',{
    template:'<p>{{footer}}</p>',
    data:function () {
     return {
      footer:11
     }
    }
   });

How to directly access the navs of navbar and the footer value of pagefooter here? This uses ref

2. Use of ref

Modify component

  <p id="app">
   <navbar ref="navbar"></navbar>
   <pagefooter ref="pagefooter"></pagefooter>
  </p>
   new Vue({
    el:'#app',
    created:function(){
     
    },
    mounted:function () {
     this.$refs.navbar.navs=222
     //ready,
     //这里怎么直接访问navbar的navs和pagefooter的footer值呢，
      console.log(this.$refs.navbar.navs);
      console.log(this.$refs.pagefooter.footer);
    }
   })

If you only use it on a common tag

<p ref="demo"></p>

His role is similar to:

document.querySelector('[ref=demo]');

The effect is the same

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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