Essential development skills and examples for VUE3 beginners-Vue.js-php.cn

Essential development skills and examples for VUE3 beginners

王林

Release： 2023-06-16 09:00:10

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VUE3 is one of the increasingly used front-end frameworks, and more and more developers are beginning to try to learn and use it. Especially in China, the application of VUE3 has covered many fields, both on mobile and PC. Therefore, this article will provide beginners with some essential tips and examples for VUE3 development to help them develop more quickly and efficiently.

Use VUE3 scaffolding to quickly create projects

In the process of learning VUE3, many people may build the project step by step, which will take a lot of time and is prone to errors. . Therefore, we can use the scaffolding tool that comes with VUE3 to quickly create a Vue project. The command is as follows:

npm install -g @vue/cli
vue create my-project

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With this command, we can quickly create a project based on VUE3.

Using the Composition API in VUE3

VUE3 has added a Composition API that allows us to manage the logic of components more conveniently. Using the Composition API, the same logic can be extracted into a function and reused in components, thereby improving the maintainability and readability of the code. The sample code is as follows:

import { defineComponent, ref } from 'vue'

export default defineComponent({
  setup(){
    const count = ref(0)

    const increment = () => {
      count.value++
    }

    return {
      count,
      increment
    }
  }
})

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In the above code, we use the defineComponent function to define a component, and use the setup function to initialize the defined responsive variables and functions ; ref is used to define responsive variables, arrow functions are used to define responsive functions increment, and these two variables and functions are returned within the scope. This makes our components more simplified and reusable.

Using the Teleport component in VUE3

VUE3 has added a new Teleport component, which allows us to place a component in a specific location on the page. Positional rendering, this function is very practical in actual projects. For example, we can use Teleport to insert a modal box component in <body>. This not only ensures that the style coverage of the modal box component is larger, but also makes the code more concise and easier to read. The sample code is as follows:

<template>
  <teleport to="body">
    <Modal :visible="visible" @update:visible="onClose"/>
  </teleport>
</template>

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In the above code, we added a <teleport> tag outside the <Modal> component and then ## The #to attribute is set to "body", which will render the <Modal> component into the <body> tag of the page.

The new

Fragment component in VUE3 allows us to Return multiple child nodes. This is also very convenient in actual development and can make the code more concise and clear. The sample code is as follows:

<template>
  <div>
    <h1>Hello World!</h1>
    <Fragment>
      <p>Welcome to </p>
      <p>VUE3 World</p>
    </Fragment>
  </div>
</template>

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In the above code, we use the

Fragment component to merge the two

tags and treat them as one Overall child node, which can make the semantics clearer.

In VUE3, you can define global components through

app.component, and global components can be anywhere Use to make code reuse more convenient. The sample code is as follows:

import { createApp } from 'vue'
import MyComponent from './MyComponent.vue'

const app = createApp({})

app.component('myComponent', MyComponent)

app.mount('#app')

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In the above code, we define a global component named

myComponent, and its template is defined by the MyComponent.vue file. . Then we use app.mount to mount the entire application to a certain location.

Summary

It can be seen from the above VUE3 development skills and examples that VUE3 has many practical skills and components in the development process. These skills can help us write code more conveniently, and It can improve the readability and maintainability of the code, improve development efficiency and reduce error rates during the development process, and is especially valuable for novices. Therefore, it is highly recommended that developers learning VUE3 try to use these techniques and components in project development to improve project development efficiency and code elegance.

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