A must-have quick development guide for VUE3 beginners

VUE3 A must-have guide for rapid development for beginners

Vue is a popular JavaScript framework. Its ease of use, high degree of customization, and rapid development mode make it popular in front-end development. . The latest Vue3 introduces more powerful features, including performance optimization, TypeScript support, Composition API, better custom renderers, etc. This article will provide a quick development guide for Vue3 beginners to help you quickly get started with Vue3 development.

1. Install Vue3

First of all, before starting Vue3 development, we need to install Vue3 first. You can install Vue3 in the project through the following command:

npm install vue@next

If you are using CDN to introduce Vue3, you need to use the following code:

<script src="https://unpkg.com/vue@next"></script>

2. Create Vue3 application

After installing Vue3, we can start building the application. Vue3 provides Vue CLI tools to help us quickly create and configure Vue3 applications.

You can use the following command to install Vue CLI:

npm install -g @vue/cli

The command to create a new project is as follows:

vue create my-project

3. Use Vue3 components

Vue3 uses a completely rewritten renderer, so you need to pay attention to some changes when using Vue3 components. The following is an example of a Vue3 component:

// HelloWorld.vue
<template>
  <div>
    <h1>Hello world!</h1>
  </div>
</template>

<script>
import { defineComponent } from 'vue';

export default defineComponent({
  name: 'HelloWorld',
});
</script>

It is worth noting that you need to use defineComponent# in Vue3 ## function to define components instead of Vue.extend in Vue2.

Using Composition API

Composition API is a new feature in Vue3, which allows us to better organize and reuse component logic code. The following is an example:

// HelloWorld.vue
<template>
  <div>
    <h1>Hello world!</h1>
    <p>Current count is: {{ count }}</p>
    <button @click="incrementCount">Increment Count</button>
  </div>
</template>

<script>
import { defineComponent, ref } from 'vue';

export default defineComponent({
  name: 'HelloWorld',
  setup() {
    const count = ref(0);

    const incrementCount = () => {
      count.value++;
    };

    return {
      count,
      incrementCount,
    };
  },
});
</script>

As you can see, in the Composition API, we can put the logic code in the

setup function, and then pass the variables and functions through return statements are exposed to templates.

Routing using Vue3

The router in Vue3 contains some new features and changes, the following is an example:

// router/index.js
import { createRouter, createWebHistory } from 'vue-router';
import Home from '../views/Home.vue';
import About from '../views/About.vue';

const routes = [
  {
    path: '/',
    name: 'Home',
    component: Home,
  },
  {
    path: '/about',
    name: 'About',
    component: About,
  },
];

const router = createRouter({
  history: createWebHistory(process.env.BASE_URL),
  routes,
});

export default router;

With the router in Vue2 In comparison, the way of using routers in Vue3 has changed slightly. You need to use the

createRouter and createWebHistory functions to create a router.

Using Vue3 state management

The state management in Vue3 has also changed. The following is an example:

// store/index.js
import { createStore } from 'vuex';

export default createStore({
  state() {
    return {
      count: 0,
    };
  },
  mutations: {
    increment(state) {
      state.count++;
    },
  },
  actions: {
    increment(context) {
      context.commit('increment');
    },
  },
  getters: {
    count(state) {
      return state.count;
    },
  },
});

As you can see, in Vue3 , we need to use the

createStore function to create a new state management instance. At the same time, you need to use the context parameter in actions to call mutations.

Summary

Vue3 is a powerful and easy-to-use JavaScript framework that can develop Web-based applications very quickly. By installing Vue3, creating Vue3 applications, using Vue3 components, Composition API, Vue3 routing and Vue3 state management, we can better understand the characteristics and practical application methods of Vue3, and accumulate valuable experience and knowledge for further learning Vue3 development.

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