The role of ref function in vue

The ref function is used in Vue.js to create a mutable reference in order to access and modify a component instance or DOM element. It can play a role in the following scenarios: 1. Access DOM elements; 2. Access component instances; 3. Access component properties.

The role of the ref function in Vue.js

The ref function in Vue.js is used to create Mutable reference functions that allow access and modification of component instances or DOM elements. It is very useful in the following scenarios:

1. Access DOM elements

In the ref function, you can pass a string or a function as a parameter to indicate that you want to reference DOM element, for example:

<code><template>
  <div ref="myDiv">...</div>
</template>

<script>
  export default {
    mounted() {
      console.log(this.$refs.myDiv); // 访问 DOM 元素
    }
  }
</script></code>

2. Access the component instance

Similarly, the ref function can also be used to access the component instance:

<code><template>
  <MyComponent ref="myComponent">...</MyComponent>
</template>

<script>
  export default {
    mounted() {
      console.log(this.$refs.myComponent); // 访问组件实例
    }
  }
</script></code>

3. Access the properties of the component

ref function can also be used to access the properties of the component:

<code><template>
  <MyComponent ref="myComponent" :title="title">...</MyComponent>
</template>

<script>
  export default {
    data() {
      return {</code>

The above is the detailed content of The role of ref function in vue. For more information, please follow other related articles on the PHP Chinese website!