From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Lazy loading components (React.lazy + Suspense)

Lazy loading components (React.lazy + Suspense)

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Lazy loading components (React.lazy + Suspense)

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This session will guide you through the process of lazy loading components in React using Lazy and Suspense. In React, all our code is bundled into one large JavaScript file by default. This can become a problem for large components like charts, image galleries, or maps because they slow down the initial load for the user. Lazy loading solves this by splitting your code into smaller chunks. Heavy components are loaded only when the user needs them, keeping the initial page load fast. In this example, we have a heavy component that is lazy loaded. The user can click the button to show or hide it. While the component is being loaded, React shows a fallback message – Loading. Until the user clicks the Show button, the heavy component is not loaded at all. It is not imported at all. This reduces memory usage and improves performance. The key takeaway? Lazy loading lets React load heavy components only when necessary, making your app faster and more efficient. Let's create the Components…

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