What does it mean to lazy load vue?

In Vue.js, lazy loading allows components or resources to be loaded dynamically as needed, reducing initial page loading time and improving performance. Specific implementation methods include using and components. It should be noted that lazy loading can cause FOUC (splash screen) issues and should be used only for components that require lazy loading to avoid unnecessary performance overhead.

Lazy loading in Vue.js

In Vue.js, lazy loading is a technique that allows components or resources to be loaded dynamically when needed, rather than loading everything at once when the app starts.

Why use lazy loading?

The main advantages of lazy loading are:

• Reduce initial page loading time and improve page performance.
• Avoid loading of unwanted components while the page is loading, thus saving bandwidth.
• Improve user experience and make page scrolling smoother.

How to implement lazy loading?

In Vue.js, lazy loading can be achieved using <keep-alive></keep-alive> and <component is></component> components.

Use <keep-alive></keep-alive>

The <keep-alive></keep-alive> component prevents the component from being destroyed when switching routes, thereby quickly re-rendering if needed.

 <code><template> <keep-alive> <router-view></router-view> </keep-alive> </template></code>

Use <component is></component>

<component is></component> component allows the component to be loaded dynamically and uses a placeholder component to represent what was before the component loads.

 <code><template> <component :is="componentName" v-if="componentName" :key="componentName"> <loading></loading> </component> </template> <script> export default { data() { return { componentName: null }; }, created() { // 在需要时动态加载组件setTimeout(() => { this.componentName = &#39;MyComponent&#39;; }, 1000); } }; </script></code>

Other precautions

• When using lazy loading, you need to be aware that the component may experience FOUC (splash screen) problems before loading.
• Make sure to use lazy loading technology only for components that need lazy loading, avoid unnecessary performance overhead.
• The performance of lazy loading can be further optimized through appropriate code splitting and on-demand loading techniques.

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