TLDR
React's useRef hook is a perfect way to share the state between each render without causing a new render. It is not good practice to keep anything outside the component. Every render create its own scope and each scope has its own state. UseRef returns a mutable ref object whose current property is set to be updated each time the component re-rendering is re-rendered. The state is set after the component was rendered and set a new state after each render is rendered. It works, but it is not a good idea to keep state outside of component.via the TL;DR App
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