Detailed explanation of the difference between lazy loading of vue and lazy loading of subcomponents

The difference between lazy loading of Vue and lazy loading of child components is as follows:

1. Lazy loading concept:

• Vue lazy loading refers to the lazy loading of resources such as images, that is, the resource is loaded only when scrolling to the viewport range where the resource is located.
• Lazy loading of child components means delaying loading of component instances, that is, loading is done when the component needs to be used.

1. Implementation method:

• Vue lazy loading can be achieved by using third-party libraries such as vue-lazyload or custom implementations.
• Lazy loading of child components can be achieved through Vue asynchronous components or dynamic components. Asynchronous components put the component's loading logic in an asynchronous callback, while dynamic components switch components through dynamic binding.

1. Application scenarios:

• Vue lazy loading is mainly used to optimize the loading of resources such as images, improve page loading speed and save bandwidth.
• Lazy loading of subcomponents is mainly used to load components on demand to avoid performance problems caused by loading too many components at once.

1. Notes:

• When Vue lazy loading, you need to pay attention to the problem of image loading delay and viewport range, and to handle appropriately when the image loading fails.
• When lazily loading subcomponents, you need to pay attention to the state management and life cycle control of the components, as well as appropriate cleaning operations when component unloading.

In short, Vue lazy loading and subcomponent lazy loading are both technical means to optimize performance and improve user experience. It is necessary to choose the appropriate implementation method according to the specific application scenario.

Here is a simple example of lazy Vue loading and lazy child components:

Vue lazy loading:

<template>  
  <div>  
    <div v-for="image in images" :key="">  
      <img v-lazy="" alt="">  
    </div>  
  </div>  
</template>  
  
<script>  
import Vue from 'vue';  
import VueLazyload from 'vue-lazyload';  
  
(VueLazyload, {  
  preLoad: 1.3,  
  error: 'dist/',  
  loading: 'dist/',  
  attempt: 1  
});  
  
export default {  
  data() {  
    return {  
      images: [  
        { id: 1, src: 'dist/' },  
        { id: 2, src: 'dist/' },  
        { id: 3, src: 'dist/' }  
      ]  
    };  
  }  
};  
</script>

In this example, we use the vue-lazyload library to implement Vue lazy loading. In the template, we use the v-lazy directive to specify the src attribute of the image, which will automatically load the image when it enters the viewport range. We can also specify preload, loading, loading, and other states in the Vue lazy loading configuration.

Lazy loading of child components:

<template>  
  <div>  
    <button @click="loadComponent">Load Component</button>  
    <div v-if="isComponentLoaded">  
      <my-component></my-component>  
    </div>  
  </div>  
</template>  
  
<script>  
import MyComponent from './';  
  
export default {  
  data() {  
    return {  
      isComponentLoaded: false,  
    };  
  },  
  components: { MyComponent },  
  methods: {  
    loadComponent() {  
       = true; // Manually trigger component loading logic, such as requesting data from the server, etc.    }  
  }  
};  
</script>

In this example, we use Vue's asynchronous component to implement lazy loading of subcomponents. In the template, we use the v-if directive to control the display and hiding of components, and the components will only be displayed if isComponentLoaded is true. In the loadComponent method, we manually trigger the loading logic of the component, such as requesting data from the server, etc. When the component is loaded, the value of isComponentLoaded becomes true and the component will be displayed.

The above is a detailed explanation of the difference between lazy loading vue and lazy loading of subcomponents. For more information on the difference between lazy loading vue and lazy loading of subcomponents, please pay attention to my other related articles!