How to write your own function and use React js everywhere?

Question

React

For example, I have an input and there is an onBlur function for it. I don’t want to separately create a component for the input, but only hang each input where the onBlur function is needed, but where to write and how to import it in order to use it. I write components as classes, sometimes I also write functions.

Answer 1

create a folder fnc there write a function import it and use it where necessary