cal.pub0.org/packages/debugging/components/RenderCounter.tsx

18 lines
528 B
TypeScript
Raw Normal View History

import { useRef } from "react";
/**
* Updates in document the number of times a component has been rendered. Helps in 2 ways. Using it doesn't cause any additional renders.
* - Did the component render when it shouldn't have?
* - Did the component reset its state when it shouldn't have?
*/
export const RenderCounter = ({ label }: { label: string }) => {
const counterRef = useRef(0);
counterRef.current++;
return (
<span>
<span>{label}:</span>
<span>{counterRef.current} </span>
</span>
);
};