React Lazy Loading and Code Splitting
Lazy loading and code splitting are performance optimization techniques used to reduce initial bundle size in React applications. Instead of loading the entire application upfront, code is split into smaller chunks and loaded only when required. This approach is essential in production applications with multiple routes, dashboards, or heavy components.
Problem Without Code Splitting
Explains the issue lazy loading solves in real applications.
Lazy Loading a Page Component
Defines a lazily loaded component using React.lazy. The component code is split into a separate bundle and loaded only when rendered.
Suspense Boundary
Suspense displays a fallback UI while the lazy-loaded component is being downloaded.
Lazy Loading Routes
Applies lazy loading at the routing level so each route is loaded only when accessed.
Lazy Loading Heavy Components
Lazy loads non-critical heavy UI components such as charts or editors.
When to Use Lazy Loading
Guidelines for deciding what should be lazy loaded.
Production Notes
Important production considerations when using lazy loading.