Vue $refs 对象

methods: {
  changeVal() {
    this.$refs.pEl.innerHTML = "Hello!";
  }
}

定义和用法

标有内置 ref 属性的 DOM 元素存储在 $refs 对象中。

可以使用 this 关键字访问 $refs 对象内的元素。

$refs 对象用于访问 DOM 元素，以类似于在纯 JavaScript 中使用 querySelector() 和 getElementById() 的方式读取或操作它们。

更多示例

<template>
  <h1>示例</h1>
  <p ref="p1">Click the button to copy this text into the paragraph below.</p>
  <button @click="transferText">Transfer text</button>
  <p ref="p2">...</p>
</template>

<script>
  export default {
    methods: {
      transferText() { 
        this.$refs.p2.innerHTML = this.$refs.p1.innerHTML;
      }
    }
  };
</script>

<template>
  <h1>示例</h1>
  <p>Start writing inside the input element, and the text will be copied into the last paragraph by the use of the '$refs' object.</p>
  <input ref="inputEl" @input="getRefs" placeholder="Write something..">
  <p ref="pEl"></p>
</template>

<script>
  export default {
    methods: {
      getRefs() { 
        this.$refs.pEl.innerHTML = this.$refs.inputEl.value;
      }
    }
  };
</script>

<template>
  <h1>示例</h1>
  <p>Click the button to reveal the 3rd list element stored as an array element in the $refs object.</p>
  <button @click="getValue">Get the 3rd list element</button><br>
  <ul>
    <li v-for="x in liTexts" ref="liEl">{{ x }}</li>
  </ul>
  <pre>{{ thirdEl }}</pre>
</template>

<script>
  export default {
    data() {
      return {
        thirdEl: ' ',
        liTexts: ['Apple','Banana','Kiwi','Tomato','Lichi']
      }
    },
    methods: {
      getValue() { 
        this.thirdEl = this.$refs.liEl[2].innerHTML;
        console.log("this.$refs.liEl = ",this.$refs.liEl);
      }
    }
  };
</script>

<style>
pre {
  background-color: lightgreen;
  display: inline-block;
}
</style>

相关页面

Vue 教程:Vue 模板参考

Vue 参考:Vue 'ref' 属性