Master lazy loading techniques in React with these practical examples. Start with the fundamentals: using React.lazy() and <Suspense> for basic code-splitting. Next, the most popular strategy is demonstrated—route-based splitting with React Router, where each page is loaded on demand. For maximum optimization, conditional loading of heavy components based on user interaction is also explored. These patterns are critical for speeding up initial load times, improving Core Web Vitals, and building high-performance React applications.
1 React Lazy Loadings
React Infinite Scrolling with IntersectionObserver
An infinite scroll gallery built with React, fetching images from the Unsplash API. It leverages the native Intersection Observer API via a useCallback ref to detect when the user reaches the bottom of the grid, automatically triggering the next page fetch and state update for a seamless browsing experience.
See the Pen React Infinite Scrolling with IntersectionObserver.
