React Custom Hook: useRenderCount — Sergey Leschev на vc.ru

In this article series, we embark on a journey through the realm of custom React hooks, discovering their immense potential for elevating your development projects. Our focus today is on the "useRenderCount" hook, one of the many carefully crafted hooks available in the collection of React custom hooks.

Github: https://github.com/sergeyleschev/react-custom-hooks

import { useEffect, useRef } from "react" export default function useRenderCount() { const count = useRef(1) useEffect(() => count.current++) return count.current }

The useRenderCount hook utilizes React's useEffect and useRef hooks to keep a count of renders. With each render, the count is incremented, providing you with real-time feedback on the component's render frequency.

One of the major advantages of using useRenderCount is its simplicity. By abstracting the logic into a reusable hook, you can easily integrate it into any component without cluttering your codebase. Additionally, it provides a clear and concise way to monitor render behavior, which can be crucial for performance optimization and debugging.

import useRenderCount from "./useRenderCount" import useToggle from "../useToggle/useToggle" export default function RenderCountComponent() { const [boolean, toggle] = useToggle(false) const renderCount = useRenderCount() return ( <> <div>{boolean.toString()}</div> <div>{renderCount}</div> <button onClick={toggle}>Toggle</button> </> ) }

This versatile hook can be applied in various scenarios. For instance, when you're developing a complex component that exhibits unexpected rendering patterns, useRenderCount helps you pinpoint the problem by showing the exact number of renders. It is also handy for measuring the impact of certain optimizations or refactoring techniques, allowing you to assess their effectiveness.

To get started, simply import the useRenderCount hook and call it within your component. You can see its power in action by checking out the RenderCountComponent example above. By combining useRenderCount with other custom hooks like useToggle, you can build interactive components while keeping an eye on render counts.

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