VUE3 development introductory tutorial: using Vue.js to achieve a one-stop development solution

Vue.js is a popular JavaScript framework that greatly simplifies the process of building web applications. Vue.js applies the MVC pattern to web development. It combines declarative rendering and componentization ideas, allowing developers to build web applications faster and easier. This article will introduce VUE3, a new version of the Vue.js framework, and use VUE3 to implement a one-stop development solution.

1. Introduction to VUE3 framework

Vue.js is a JavaScript framework created by You Yuxi. Its goal is to help developers build reusable Web by providing a simple API. components.

Vue.js provides a basic MVC architecture. Under this framework, developers can use Vue.js declarative syntax to describe the behavior and status of UI components.

Vue.js 3 is the latest version of the Vue.js framework. It has made a lot of improvements in performance and readability, and also strengthened developers’ debugging and testing capabilities, which will benefit future web development. Lieutenant General is more important.

2. Features of the VUE3 framework

The most noteworthy thing about the VUE3 framework is its performance. Compared with the previous version of VUE2, VUE3 has greatly improved the processing of virtual DOM. The DOM can be updated more efficiently, reducing rendering time and memory usage.

Secondly, VUE3 also improves TypeScript support. TypeScript can be used to catch errors when writing code, greatly improving the maintainability of the application.

The VUE3 framework also provides a new composition API and moves the template compiler into a separate package. This allows developers to better separate state from UI and simplifies framework development.

3. One-stop development solution

Now, we will use VUE3 to implement a simple one-stop development solution. In this application, we will implement login, registration and simple data management.

1. Create a new VUE3 project

First, we need to install Vue.js. Here we use Vue CLI, which allows us to create projects and add plug-ins more conveniently.

Enter the following command in the terminal to create a new VUE3 project:

vue create vue3-app

Assuming you have installed and set up the Vue CLI, this command will create a new VUE3 project and basic files structure.

2. Create a simple login page

Create a new component Login.vue in the src/components folder. The Login component will contain a login form for users to log in to the application.

<template>
  <form @submit.prevent="login">
    <label for="email">邮箱</label>
    <input type="email" id="email" v-model="email" required>

    <label for="password">密码</label>
    <input type="password" id="password" v-model="password" required>

    <button type="submit">登录</button>
  </form>
</template>

<script>
  import { ref } from 'vue'

  export default {
    name: 'Login',

    setup() {
      const email = ref('')
      const password = ref('')

      const login = () => {
        console.log(`Logging in with email ${email.value} and password ${password.value}`)
      }

      return {
        email,
        password,
        login
      }
    }
  }
</script>

At this point, we have a simple login form that collects the user's email and password and allows the user to log in to the application. The code here uses the Composition API of Vue.js 3 to better separate component state and behavior.

3. Create a registration page

Create a new component Register.vue in the src/components folder. The Register component will contain a registration form for users to register and join the application.

<template>
  <form @submit.prevent="register">
    <label for="name">姓名</label>
    <input type="text" id="name" v-model="name" required>

    <label for="email">邮箱</label>
    <input type="email" id="email" v-model="email" required>

    <label for="password">密码</label>
    <input type="password" id="password" v-model="password" required>

    <button type="submit">注册</button>
  </form>
</template>

<script>
  import { ref } from 'vue'

  export default {
    name: 'Register',

    setup() {
      const name = ref('')
      const email = ref('')
      const password = ref('')

      const register = () => {
        console.log(`Registering with name ${name.value}, email ${email.value} and password ${password.value}`)
      }

      return {
        name,
        email,
        password,
        register
      }
    }
  }
</script>

Similarly, here we have created a registration form to collect the user’s name, email, and password. The form will call a component method on submission to send this data to the server for registration.

4. Create a data management page

Create a new component Data.vue in the src/components folder. The Data component will contain a table that displays the user's data and will also provide options for adding, editing, viewing, and deleting data items.

<template>
  <div>
    <table>
      <thead>
        <tr>
          <th>姓名</th>
          <th>邮箱</th>
          <th>操作</th>
        </tr>
      </thead>

      <tbody>
        <tr v-for="item in data" :key="item.id">
          <td>{{ item.name }}</td>
          <td>{{ item.email }}</td>
          <td>
            <button @click="view(item)">查看</button>
            <button @click="edit(item)">编辑</button>
            <button @click="delete(item)">删除</button>
          </td>
        </tr>
      </tbody>
    </table>

    <div>
      <button @click="add">添加数据</button>
    </div>
  </div>
</template>

<script>
  import { ref } from 'vue'

  export default {
    name: 'Data',

    setup() {
      const data = ref([
        { id: 1, name: '张三', email: 'zhangsan@abc.com' },
        { id: 2, name: '李四', email: 'lisi@abc.com' },
        { id: 3, name: '王五', email: 'wangwu@abc.com' }
      ])

      const add = () => {
        console.log('Adding a new data item')
      }

      const edit = (item) => {
        console.log(`Editing data item with id ${item.id}`)
      }

      const deleteItem = (item) => {
        console.log(`Deleting data item with id ${item.id}`)
      }

      const view = (item) => {
        console.log(`Viewing data item with id ${item.id}`)
      }

      return {
        data,
        add,
        edit,
        deleteItem,
        view
      }
    }
  }
</script>

In this code, we create a data table to display the user's data. The table also contains a set of buttons for adding, viewing, editing, and deleting data items. Here we just output some debugging information, but in actual development, we need to link these operations to the server-side API.

5. Use Vue Router to implement routing

Now that we have created three components Login, Register and Data, next, we need to use Vue Router to combine them together .

Execute the following command in the terminal to install Vue Router:

npm install --save vue-router@next

Here, we use the @next tag to indicate that we are installing the Vue.js 3 version.

Create a new file router.js in the src/router folder:

import { createRouter, createWebHistory } from 'vue-router'

import Login from '../components/Login.vue'
import Register from '../components/Register.vue'
import Data from '../components/Data.vue'

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/register', component: Register },
  { path: '/data', component: Data }
]

const router = createRouter({
  history: createWebHistory(),
  routes
})

export default router

In this code, we define the routes array, which contains three routing. The createRouter function creates a new routing instance and exports it for use in other files.

6. Calling various components in App.vue

In src/App.vue, we created a simple navigation menu for calling Login, Register and Data component.

<template>
  <div id="app">
    <nav>
      <ul>
        <li><router-link to="/login">登录</router-link></li>
        <li><router-link to="/register">注册</router-link></li>
        <li><router-link to="/data">数据</router-link></li>
      </ul>
    </nav>

    <router-view></router-view>
  </div>
</template>

<script>
import { defineComponent } from 'vue'

export default defineComponent({
})
</script>

<style>
nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

nav li {
  display: inline-block;
  margin-right: 10px;
}

nav a {
  text-decoration: none;
  color: blue;
}
</style>

Here we use the <router-link> component to define the navigation menu.

Finally, in src/main.js, we create a new Vue.js instance and link it to the Vue Router:

import { createApp } from 'vue'
import router from './router'
import App from './App.vue'

createApp(App).use(router).mount('#app')

Now, our simple one-stop development solution The plan has been completed. Using the above code, you can quickly build web applications, and these applications will have all the advantages of Vue.js, including fast rendering, optimized performance and maintainable code.

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