Prefetching Data with React Query

Demonstrate how to prefetch data using React Query's prefetchQuery method to improve loading times and user experience.

import { useQuery, useQueryClient } from 'react-query';

function PrefetchCarDetails() {
  const queryClient = useQueryClient();

  // Function to prefetch car details
  const prefetchCarDetails = async (carId) => {
    await queryClient.prefetchQuery(['carDetails', carId], fetchCarDetails);
  };

  return (
    <div onMouseOver={() => prefetchCarDetails('123')}>Hover over me to prefetch car details!</div>
  );
}

async function fetchCarDetails(carId) {
  // Fetching logic for car details
  const response = await fetch(`/api/cars/${carId}`);
  if (!response.ok) {
    throw new Error('Network response was not ok');
  }
  return response.json();
}

This example demonstrates how to prefetch data using React Query's prefetchQuery method within a React component. When the user hovers over the specified div element, it triggers prefetching of car details for a certain car ID by calling `prefetchCarDetails`. The `fetchCarDetails` function simulates fetching data from an API endpoint. This approach improves user experience by loading data in advance before the actual request is made.