Implementation method of dynamically adding/removing component functions in Vue documentation

Vue.js is a popular JavaScript library that provides a wide range of APIs and tools for developing interactive web applications. One of the features is the ability to dynamically add and delete components, making the content of the page more flexible. In the Vue official documentation, there is a detailed introduction to how to implement the function method of dynamically adding/removing components. Let us take a look at it together.

1. Dynamicly add components

Vue.js provides a special component element<component>, which allows us to dynamically switch components without No need to re-render the entire page. We can bind the component name that needs to be added through the v-bind:is attribute. The following is a sample code:

<template>
  <div>
    <button @click="addComponent">Add Component</button>
    <hr>
    <component :is="currentComponent"></component>
  </div>
</template>

<script>
  import ComponentOne from './ComponentOne.vue'
  import ComponentTwo from './ComponentTwo.vue'

  export default {
    data() {
      return {
        currentComponent: null
      }
    },
    methods: {
      addComponent() {
        // 根据需要添加的组件名称来更改 currentComponent 值
        this.currentComponent = 'ComponentOne'
      }
    },
    components: {
      ComponentOne,
      ComponentTwo
    }
  }
</script>

In the above code, we first define a currentComponent property to store the currently used component, which is set to null during initialization. Then, use the <button> element in the template to trigger the addComponent() function, and change the value of currentComponent in the function to the name of the component that needs to be added. Finally, when using the <component> element, use v-bind:is to bind currentComponent to the component.

2. Dynamic deletion of components

Vue.js also provides a way to dynamically delete components. We can use v-if to control the components. Show and hide. The following is a sample code:

<template>
  <div>
    <button @click="removeComponent">Remove Component</button>
    <hr>
    <component-one v-if="showComponent"></component-one>
  </div>
</template>

<script>
  import ComponentOne from './ComponentOne.vue'

  export default {
    data() {
      return {
        showComponent: true
      }
    },
    methods: {
      removeComponent() {
        this.showComponent = false
      }
    },
    components: {
      ComponentOne
    }
  }
</script>

In the above code, we first define a showComponent property to control the display and hiding of the component, which is set to true during initialization. Then, use the <button> element in the template to trigger the removeComponent() function, and change the value of showComponent to false in the function. Finally, when using components, use v-if to control whether to display the component based on the value of showComponent.

3. Summary

Dynamic addition/removal of components is one of the commonly used functions of Vue.js. It is often used in development. Details are also provided in Vue official documentation. implementation method. We can use the <component> element to dynamically add components, and use v-if to dynamically delete components. Mastering these methods allows us to more flexibly control the display and interaction of the page, thus improving development efficiency and user experience.

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