📅  最后修改于: 2023-12-03 15:04:48.817000             🧑  作者: Mango
When building a React Native application, we often need to export components or functions to be used in other parts of the application. This is where the export default
keyword comes in.
The export default
keyword is used to export a single value or function from a module. This value or function can then be imported into other parts of the application using the import
keyword.
Here's an example of how to use export default
to export a function in a React Native component:
export default function MyComponent(props) {
// component code here
}
In this example, we are exporting a function called MyComponent
using the export default
keyword. This function takes in a single parameter called props
and returns the component code.
To import this component into another part of the application, we can use the following code:
import MyComponent from './MyComponent';
In this code, we are importing the MyComponent
function from the MyComponent
module using the import
keyword.
One important thing to note is that when importing a default export, the name of the imported value must match the name of the exported value. This is why we are using the same name (MyComponent
) in both the export and import statements.
In conclusion, the export default
keyword is an essential part of building React Native applications. It allows us to easily export values and functions from modules and use them in other parts of the application.