Default exports & Name exports

The export declaration lets you to export a specific part from JavaScript files which can be imported into other files using import declaration for reusing. The default prefix marks that function/class as an entry point (main function) in a file.

The export default prefix is a standard JavaScript Syntax(not specific to react). It lets you mark the main function in a file so that you can later import it from other files.

For example:
Exporting a Button component by Default export

export default Button

Exporting a Button component by Name export

export Button

You can use both(default & name) of them in the same file.
A file cannot have more than one default export but it can have as many named exports.
How you export your component tells you how to import it because if you try to import a default export the same way you do a named export, it will log an error.

Default export

Export syntax:

export default function Button() {...}

Import syntax:

import Button from ‘./button.js’

Name export

Export syntax:

export function Button() {...}

Import syntax:

import { Button } from ‘./button.js’

When you are importing a component with export default, you can put any name you want after import. For example, import Hello from ‘./button.js’ instead of import Button from ‘./button.js’. While in named imports, the name has to match on both sides.

Summary

Use default exports when you have one component in the file and use name exports when your file exports multiple components.
Also, components without names like export default () => {...} are discouraged because they make debugging harder.
To reduce the potential confusion between default and name exports, you can stick to only one style (default or named). For default export, each file will need to export only one component. While for name export, each file can export multiple components.