Implementing Lazy Loading in React Charts

Demonstrate how to implement lazy loading of data points in TanStack React Charts to improve initial load time and performance.

const ChartComponentLazy = React.lazy(() => import('./ChartComponent'));

This line dynamically imports the ChartComponent. React.lazy is used for lazy loading, which means the component is loaded only when it's needed, thus improving initial load time.

<Suspense fallback={<div>Loading Chart...</div>}>
  <ChartComponentLazy />
</Suspense>

Wraps the lazy-loaded ChartComponentLazy in a Suspense component. Suspense allows you to display a fallback UI (e.g., 'Loading Chart...') until the component has finished loading.

const useChartData = (url) => {
  const [data, setData] = useState([]);
  useEffect(() => {
    const loadData = async () => {
      const response = await fetch(url);
      const data = await response.json();
      setData(data);
    };
    loadData();
  }, [url]);
  return data;
};

Defines a custom hook, useChartData, for fetching chart data asynchronously from a provided URL. This allows us to lazily fetch data only when the component is rendered.

const LazyLoadChartData = ({ url }) => {
  const data = useChartData(url);
  return (
    <Suspense fallback={<div>Loading Chart...</div>}>
      <ChartComponentLazy data={data} />
    </Suspense>
  );
};

This component uses the useChartData hook to fetch data and passes it to the lazy loaded ChartComponentLazy. It demonstrates how both component and data can be lazily loaded to improve performance.