BEGINNER • HTML and CSS Basics
Component Checkpoint #18
This lesson focuses on reduce bundle size for a dashboard with charts interface. You will use: npx create-react-app my-app | npm run dev | document.querySelector('.btn'). The content is designed for practical frontend development.
Code Example
// Performance: lazy load
const HeavyChart = React.lazy(() => import('./HeavyChart'));
<Suspense fallback={<Spinner />}>
<HeavyChart data={data} />
</Suspense>
// dashboard with chartsCommands & References
- npx create-react-app my-app
- npm run dev
- document.querySelector('.btn')
Lab Steps
- Set up with: npx create-react-app my-app
- Build or refactor the component for the scenario.
- Validate accessibility and performance.
- Propose one improvement for production.
Exercises
- Add one accessibility enhancement.
- Implement one performance optimization.
- Write one unit test for this component.