How to use the routing lazy loading function in the Vue documentation

Vue is a popular JavaScript framework that provides an easy way to build dynamic and interactive user interfaces. Vue’s routing functionality allows developers to easily manage application navigation and page jumps. In the Vue documentation, there is a route lazy loading function that can significantly improve application performance. In this article, we will introduce in detail how to use the routing lazy loading function in the Vue documentation.

What is lazy loading of routes?

In traditional web development, when a user accesses our application, all JavaScript and CSS files are downloaded to the browser. This can result in longer first load times, especially when the application is large. To solve this problem, Vue provides lazy loading of routes. The so-called "lazy loading" means loading files only when needed, which can reduce the initial loading time of the application.

The routing lazy loading function in the Vue documentation

The Vue documentation provides a routing lazy loading function that allows page components to be loaded only when needed, rather than loading in the application. Download all at once. This approach can significantly improve application performance. Here's how to use the function:

const Foo = () => import('./Foo.vue')

In the above example, we defined a component named "Foo". This component is loaded asynchronously using the import method provided by Vue. Note that the import method is not the import statement in ES6, but the asynchronous loading syntax provided by Vue.

When using the import method, you need to pass the path of the component to it as a parameter. In the above example, the path to the component is "./Foo.vue". If our components are in different folders, the paths will need to be adjusted accordingly.

Apply the lazy loading function to the routing

After defining the routing lazy loading function, we need to apply it to the routing. The following is a simple route definition example:

import Vue from 'vue'
import VueRouter from 'vue-router'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    {
      path: '/foo',
      component: () => import('./Foo.vue')
    },
    {
      path: '/bar',
      component: () => import('./Bar.vue')
    }
  ]
})

In the above example, we use Vue’s use method to load VueRouter. We then create an instance of router and pass it the array of routes.

In the routing array, we define two routing rules. Each routing rule contains a path and a component. Here, we use the routing lazy loading function mentioned above to load the component asynchronously.

Summary

Vue’s routing lazy loading function can greatly improve application performance. It allows us to load components only when needed instead of loading them all into the browser at once. In the Vue documentation, there is a simple route lazy loading function that can be used. We can use this function by applying it to a route. The use of this function is very simple. You only need to pass the path of the component to it to realize the function of loading the component asynchronously.

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