Check the code below: usecallback-demo-1-component-renders-unnecessarily - Code You can run the app directly: usecallback-demo-1-component-renders-unnecessarily - App Whenever the button is clicked, the 'increment rendered' message is logged in console. This means, we're rendering the Increment component unnecessarily. The Increment component is rendered every time à because it depends on increment method à this method again depends on count state à so, whenever the count state changes, since count state is a dependency of Increment component, this must be rendered everytime. However, consider the following code where this problem is solved (of course using random number instead of count for demo): usecallback-demo-2-usecallback-prevents-unnecessary-renders - Code Here, we're caching the increment method using useCallback hook. The Inc...