Export, Import Functions, Classes, Components in React | Single File Multiple Components

In React we create small reusable partials or components. Preferably single responsibility components. Then we import, export, mount, unmount these components as needed in application. If we need a component, we import it in any other component and use it. We are creating a single component file and are defining multiple react components in it. This file has got components including function components and class based components. We want to use these components selectively in any other component in app. How would we export or import these components, functions and classes? How to export multiple react components from a file? How to export component as default component along with other components? How to import component as default component along with other functional components?

You export and import components based on their type. A default react component will be exported and imported without curly braces. Function components are exported and imported in different way. Function components can be default or can be many. If you are exporting and importing many functional components, you can use curly braces to export import many components at the same time. Very interesting. Also I have discussed few differences between class based components and function based components. Also some considerations on using multiple components and their wrapper requirement.

Difference between default and not default export, import in react
Export, import default components and functions in react
Classes and Functions export, import in react
Multiple react components export from single file in react
Multiple react components in single component react
React single component with multiple components react js

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[samriddhabajpai]

What if i don't want to export "functional components".... I just want to use one of the functions from a functional component into the another component. How can i do that?

[varaprasad]

What if we use multiple class components in the same file. it works right?

[saeemali]

When I do this, I get an error saying "Uncaught ReferenceError: require is not defined". What should I do?