How to delete instances of vue2 forms

With the development of front-end frameworks, Vue2 has become one of the mainstream frameworks for front-end development. Among them, the form component is one of the very important components in Vue2. During the development process of the form, we sometimes need to delete a form instance in order to reload or jump the page. So how to delete the instance of the Vue2 form? Let’s explain it in detail below.

In Vue2, we can destroy the instance through the $destroy() method. This method can be used to destroy all sub-components, instructions and event listeners. Therefore, we can use this method to delete the form instance.

First, we need to define a form component during development and mount it on a node, as shown below:

<template>
  <div>
    <form>
      <input type="text" v-model="name" />
      <input type="email" v-model="email" />
      <button @click="submitForm">Submit</button>
    </form>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: "",
      email: ""
    };
  },
  methods: {
    submitForm() {
      // 提交表单
    }
  }
};
</script>

Then, we can delete the component instance when we need to Place, for example, in the click event of the button, call the $destroy() method to destroy the component instance:

<template>
  <div>
    <!-- 表单组件 -->
    <Form></Form>
    
    <!-- 删除表单组件实例的按钮 -->
    <button @click="deleteForm">Delete Form</button>
  </div>
</template>

<script>
import Form from "./Form.vue";

export default {
  components: {
    Form
  },
  methods: {
    deleteForm() {
      // 获取表单组件实例
      const formInstance = this.$refs.form.$children[0];
      
      // 销毁表单组件实例
      formInstance.$destroy();
    }
  }
};
</script>

In the above code, we introduced the form component Form and defined a The button is used to delete the form component instance. In the button click event, we obtain the form component instance through this.$refs.form.$children[0] and call the $destroy() method to destroy the instance.

It should be noted that when destroying a component instance, there may be other things that need to be processed, such as clearing timers, canceling network requests, etc. Therefore, we need to make sure that these things have been processed before calling the $destroy() method.

The above is a brief introduction on how to delete instances of Vue2 forms. I hope it will be helpful to you.

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