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Usage of $refs in Vue

不言Original: 2018-06-25 15:09:482305browse

This article mainly introduces the usage of $refs in Vue. It is very good and has certain reference value. Friends in need can refer to it

Explanation: vm.$refs is an object that holds All subcomponents (or HTML elements) that have registered ref

Use: In the HTML element, add the ref attribute, and then obtain it through the vm.$refs. attribute in JS

Note: If you get a subcomponent, you can get the data and methods in the subcomponent through ref

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <!-- <script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> -->
  <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
  <style>
  </style>
</head>
<body>
  <p id="vue_app">
    <qinwm ref="vue_qinwm"></qinwm>
    <p ref="vue_p">Hello, world!</p>
    <button @click="getRef">getRef</button>
  </p>
</body>
</html>
<script>
  Vue.component("qinwm", {
    template: `<h1>{{msg}}</h1>`,
    data(){
      return {
        msg: "Hello, world!"
      };
    },
    methods:{
      func:function (){
        console.log("Func!");
      }
    }
  });
  new Vue({
    el: "#vue_app",
    data(){
      return {};
    },
    methods: {
      getRef () {
        console.log(this.$refs);
        console.log(this.$refs.vue_p); // <p>Hello, world!</p>
        console.log(this.$refs.vue_qinwm.msg); // Hello, world!
        console.log(this.$refs.vue_qinwm.func); // func:function (){ console.log("Func!"); }
        this.$refs.vue_qinwm.func(); // Func!
      }
    }
  });
</script>

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