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When I inspect the markup rendered by react on the server, I see a lot of comments like:
<!-- /react-text --><!-- react-text: 28 --><!-- /react-text -->
How do I make react stop rendering them?
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If you're using a React class component you can use the shouldComponentUpdate method or a React. PureComponent class extension to prevent a component from re-rendering.
When React component re-renders itself? There are four reasons why a component would re-render itself: state changes, parent (or children) re-renders, context changes, and hooks changes.
To prevent excessive re-rendering, move the expensive component to a parent component, where it will render less often, and then pass it down as a prop. If this is not enough, inject React. memo into the code for better performance.
You can't. Those are needed for React to do its job as far as knowing how to remove/replace items in the DOM. This is an improvement over the previous way React did things, which was data-reactid attributes everywhere.
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