The role of export default in vue

Question: What is the role of export default in Vue? Detailed description: export default defines the default export of the component. When importing, components are automatically imported. Simplify the import process, improve clarity and prevent conflicts. Commonly used for exporting individual components, using both named and default exports, and registering global components.

The role of export default in Vue

In Vue.js, ## The #export default syntax is used to define the default export of a component. It tells the Vue component system that this component is the default export of the module and will be automatically imported when imported from the module.

How to use export default

To use

export default in a Vue component, add at the end of the component definition The following line:

export default {
  // 组件选项
}

Benefits

There are several benefits to using

export default:

##Simplification Import:
• When importing a component from a module, you can use the module's default import instead of explicitly specifying the imported component. This simplifies the import process.
Clarity:
• It clearly indicates that the component is the default export of the module, making the component's usage intention clearer.
Single export:
• A module can only have one default export. This helps prevent conflicts and ensures that only a single component is exported.

Use case

export default

Commonly used in the following situations:

Single component export :
• When the module only exports one component, you can use export default.
Use named exports and default exports at the same time:
• When there are multiple components in the module, you can use export default to specify the default export for one of the components, and use # at the same time. ##export Syntax specifies named exports for other components. Global component registration:
When registering a component as a global component of Vue.js, you can use
• export default.
Example:

The following example shows how to use

export default:

// MyComponent.vue
export default {
  data() {
    return {
      message: "Hello World!"
    }
  },
  template: `
    <div>{{ message }}</div>
  `
}

The component can then be imported in another component :

// App.vue
import MyComponent from "./MyComponent.vue";

export default {
  components: {
    MyComponent
  }
}

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