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Are there any benefits to defining functions within React components?

I brought the code below for easy understanding. Note the location of the a function.

There are declarative differences depending on where the a function is in React.
Both are code that works correctly.

Are there any benefits of defining them within React components?

JavaScript
JavaScript
  • This is a shortened code that makes it easy to understand the intent of the question.

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Answer

In the first snippet you posted, the a function is essentially a private function in that file. It is used by your export but it is not accessible to other scopes.

In the second snippet, you have used a closure to encapsulate the a function, which is part of the exported function.

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