What does “export default” do in JSX?

When working with JSX in JavaScript, you may have come across the “export default” syntax. But what does it actually do? In this blog post, we’ll explore the purpose and usage of “export default” in JSX.

Understanding “export default”

In JSX, “export default” is used to export a single value or component as the default export of a module. It allows you to conveniently import the default export without specifying a name for it.

Let’s take a look at an example:

// MyComponent.js
import React from 'react';

const MyComponent = () => {
  return 
Hello, World!
;
}

export default MyComponent;

In the above code snippet, we have a component called MyComponent defined using JSX. By using “export default”, we are making MyComponent the default export of the module. This means that when importing this module in another file, we can choose any name for the imported component.

Importing the Default Export

To import the default export, you can use the import statement without specifying a name for the imported component:

// App.js
import React from 'react';
import MyComponent from './MyComponent';

const App = () => {
  return (
    

      
    
  );
}

export default App;

In the above code snippet, we are importing the default export from MyComponent.js using the name “MyComponent”. This allows us to use the component in our App.js file without any additional steps.

Alternative Syntax

There is an alternative syntax for importing the default export:

// App.js
import React from 'react';
import { default as MyComponent } from './MyComponent';

const App = () => {
  return (
    

      
    
  );
}

export default App;

In this syntax, we are using the “default as” syntax to assign the default export to a variable called “MyComponent”. This allows us to use the component in our code with the desired name.

Conclusion

“export default” in JSX is used to export a single value or component as the default export of a module. It provides a convenient way to import the default export without specifying a name for it. By understanding and utilizing this syntax, you can enhance the modularity and reusability of your JSX code.

Now that you know what “export default” does in JSX, you can confidently use it in your projects to export and import components effectively.