How to use $refs in vue

This time I will show you how to use $refs in vue, and what are the precautions for using $refs in vue. The following is a practical case, let's take a look.

Generally speaking, to get DOM elements, you need

document<a href="http://www.php.cn/code/658.html" target="_blank">.querySelector(".input1")</a>Get this dom node, and then get it The value of input1.

But after binding with ref, we no longer need to obtain the dom node. We can directly bind input1 to the above input and then call it in $refs.

Then call this in

javascript: this.$refs.input1 This can reduce the consumption of obtaining dom nodes

The usage is as follows:

HTML:

<p id="app">
  <input type="text" ref="input1"/>
  <button @click="add">添加</button>
</p>

JS:

<script>
new Vue({
  el: "#app",
  methods:{
  add:function(){
    this.$refs.input1.value ="test"; //this.$refs.input1 减少获取dom节点的消耗
    }
  }
})
</script>

The following will introduce the basic usage of vue $refs. The specific code is as follows:

<p id="app">
  <input type="text" ref="input1"/>
  <button @click="add">添加</button>
</p>
<script>
new Vue({
  el: "#app",
  methods:{
  add:function(){
    this.$refs.input1.value ="22"; //this.$refs.input1 减少获取dom节点的消耗
    }
  }
})
</script>

General To get the DOM element, you need

document.querySelector(".input1")Get the dom node, and then get the value of input1.

But after binding with ref, we no longer need to obtain the dom node. We can directly bind input1 to the above input and then call it in $refs.

Then call it like this in javascript: this.$refs.input1 This can reduce the consumption of obtaining dom nodes

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

Recommended reading:

How to use vue to optimize SMS verification performance

How to implement vue-i18n and vue in vue projects element-ui international development

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