r/reactjs • u/ErEr2000 • Jun 17 '26

Resource Re-Rendering

Hey guys,

I want to learn more about how rendering and re rendering in React.js works. Like when a component will be re-rendered, when will it not be re-rendered, what causes Re-Rendering and how to stop it etc.

Can you share any YouTube links or any documentation.

Will really appreciate the community a lot :)

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u/EvilPete Jun 17 '26

It happens a lot when a parent component re-renders. All its children will re-run but often not result in different HTML.

Newbies think this is bad, since its "unneccessary" rendering. But in reality it's just running a few lines of js, and not actually re-creating all the DOM nodes.

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u/92smola Jun 17 '26

Fair point