1. Introduction

In this tutorial, we will be focusing on two performance-boosting techniques in Vue.js: Lazy Loading and Code Splitting. These techniques help to reduce the initial load time of your Vue application and use resources more efficiently.

By the end of this tutorial, you will be able to:

• Understand the concepts of Lazy Loading and Code Splitting
• Implement these techniques in your Vue application

Prerequisites:

• Basic knowledge of Vue.js
• Basic knowledge of JavaScript and Webpack

2. Step-by-Step Guide

What is Lazy Loading?

Lazy Loading is a design pattern where you defer the initialization of an object until the point at which it is needed. In web development, it can be used to delay loading parts of your application until they are required, thereby improving initial load times.

What is Code Splitting?

Code Splitting is the process of splitting your code into various bundles or components, which can then be loaded on demand or in parallel. It can help to improve performance by reducing the size of the initial JavaScript payload that the browser must download and parse.

Implementing Lazy Loading and Code Splitting in Vue

Vue.js, combined with webpack, makes it straightforward to implement these techniques. The vue-router is an excellent place to implement lazy loading and code splitting as it allows you to split your code by route.

3. Code Examples

Consider a Vue application with the following routes:

import Home from './views/Home.vue'
import About from './views/About.vue'

export default new VueRouter({
  routes: [
    { path: '/home', component: Home },
    { path: '/about', component: About }
  ]
})

To apply lazy loading and code splitting, you can use dynamic imports:

const Home = () => import(/* webpackChunkName: "home" */ './views/Home.vue')
const About = () => import(/* webpackChunkName: "about" */ './views/About.vue')

export default new VueRouter({
  routes: [
    { path: '/home', component: Home },
    { path: '/about', component: About }
  ]
})

In the above code, import() function is used to load the components asynchronously. The webpackChunkName comment helps webpack to create separate bundles for each component, named home.js and about.js.

4. Summary

In this tutorial, we learned about Lazy Loading and Code Splitting techniques in Vue.js. We saw how to implement these techniques using vue-router and webpack's dynamic imports feature.

For further learning, explore how to apply lazy loading and code splitting in Vuex, Vue's state management library.

5. Practice Exercises

1. Implement Lazy Loading and Code Splitting for a Vue application with five different routes.
2. Test the performance of your application with and without Lazy Loading and Code Splitting.
3. Apply Lazy Loading and Code Splitting in a Vuex store.

Remember to test your application thoroughly after applying these techniques, and ensure all components are loading correctly. Happy coding!