How to implement lazy loading of routes in Vue technology development

How to implement lazy loading of routes in Vue technology development

In Vue development, lazy loading of routes is an important technology to improve application performance and user experience. Through lazy loading of routes, we can load each routing component of the application on demand, reducing the initial loading time and improving the response speed of the application. In this article, we will introduce in detail how to implement lazy loading of routes in Vue, and give specific code examples.

1. What is routing lazy loading

Routing lazy loading refers to a technology that loads routing components on demand in Vue projects. In traditional development, all components are loaded at once. When the size of the application becomes larger, the initial loading time will increase significantly, affecting the user experience of the application. Lazy loading of routes can divide components according to routing requirements and load them only when needed.

2. How to implement lazy loading of routes

The following is a specific step-by-step method to implement lazy loading of routes:

1. Install the babel plug-in

Before using routing lazy loading, we need to install the babel plug-in @babel/plugin-syntax-dynamic-import. You can install it through the following command:

npm install --save-dev @babel/plugin-syntax-dynamic-import

2. Modify the configuration file

Find the babel.config.js file in the project root directory and change @babel/preset-envChange modules in the configuration to false, and add the plug-in @babel/plugin-syntax-dynamic-import , the configuration is as follows:

module.exports = {
  presets: [
    '@babel/preset-env'
  ],
  plugins: [
    '@babel/plugin-syntax-dynamic-import'
  ]
}

3. Modify routing configuration

In Vue’s routing configuration file (usually router/index.js), add The original component introduction method is modified to lazy loading. Here is an example:

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

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    name: 'Home',
    component: () => import(/* webpackChunkName: "home" */ '../views/Home.vue')
  },
  {
    path: '/about',
    name: 'About',
    component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})

export default router

In the above code, the value of the component attribute is changed to an arrow function, and import(/* webpackChunkName: "name" */ ' ../path/to/component.vue') syntax to load components on demand. Among them, name and path/to/component.vue are the name of the component and the path relative to router/index.js.

4. Rebuild the project

After completing the above steps, rebuild the project. You can see that in the browser's developer tools, each routing component will generate an independent files will only be loaded when needed.

So far, we have successfully implemented lazy loading of routes in Vue.

Summary

Lazy loading of routing is an important technology in Vue development. By loading routing components on demand, the performance and user experience of the application can be greatly improved. This article details the steps to implement lazy loading of routes and gives specific code examples. I hope this article will help you understand and use routing lazy loading.

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