The role of Vue3 public components and common code analysis

In Vue3, the files of public components play a very important role. Its role is mainly reflected in: registering global components, introducing public styles, introducing Vue, introducing components, creating Vue instances, and mounting instances. This article will explain in detail the files of Vue3 public components, including its functions, commonly used codes, etc.

1. Function

1. Register global components

In, we can use the() method to register the global component so that it can be used throughout the project. The specific code is as follows:

('my-component', {
  // Component options...})

My component is called 'my-component', which accepts an option object that contains the component's templates, data, methods, etc. Then we can use it in other components like this:

2. Introduce public styles

We can make this style available throughout the project by introducing a common style in it. The following code:

import './assets/'

Here we assume that our public style file is ''. This style file can then be used in all components.

2. Common codes

In the files of Vue3 common components, there are some commonly used code blocks. The following will introduce these common codes in detail:

1. Introduce Vue

In this article, we need to first introduce the Vue library file to use Vue-related components and methods. The code is as follows:

import { createApp } from 'vue'

Here we use the ES6 ‘import’ syntax and introduce the ‘createApp’ method of Vue.

2. Introduce components

In this, we may need to introduce other components as follows:

import MyComponent from '@/components/'

Here we assume that the component we are introducing is called ‘MyComponent’ and its path is ‘@/components/’. After that, we can register this component.

3. Register components

We can use the() method to register global components, the code is as follows:

('my-component', MyComponent)

Here we register MyComponent as ‘my-component’, and then we can use it in other components.

4. Create a Vue instance

In, we need to create a Vue instance, the code is as follows:

const app = createApp(App)

Here we assume that our root component is called ‘App’, we use the ‘createApp’ method to create a Vue instance and store it in the ‘app’ variable.

5. Mounting example

After creating the Vue instance, we need to mount it on the page to make it work normally. The code is as follows:

('#app')

Here we assume that the id of the root element of our root component is 'app'.

3. Summary

Through the introduction of this article, we understand the role of the files of Vue3 common components and the common code. By registering global components in and introducing public styles, we can make the development of the entire project more efficient. At the same time, understanding the meaning and usage of common code can also enable us to better use Vue3 for development.

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