?? React Query: Best Practices vs. Pitfalls ??

Hey LinkedIn fam! ?? Let's dive into some React Query best practices and avoidable pitfalls. Whether you're a seasoned developer or just getting started with React Query, these tips can help you build robust and performant applications. ???

Good Practice: Optimize Query Keys

? Best Practice: Use Stable and Unique Query Keys

// Good
const { data } = useQuery(['userData', userId], fetchUserData);

// Bad
const { data } = useQuery(['user', Math.random()], fetchUserData);        

Good Practice: Separating Queries and Mutations

? Best Practice: Organizing your queries and mutations into separate files or modules enhances code readability and maintainability.

// queries.js
import { useQuery } from 'react-query';

export const useUserData = () => {
  return useQuery('userData', () => fetchUserData());
};

// mutations.js
import { useMutation } from 'react-query';

export const useUpdateUserData = () => {
  return useMutation((updatedData) => updateUser(updatedData));
};        

Good Practice: Handling Mutations

? Best Practice: Handle Mutations Effectively

// Good
const { mutate } = useMutation(updateUserData, {
  onSuccess: () => queryClient.invalidateQueries('userData'),
});

// Bad
const { mutate } = useMutation(updateUserData);        

Good Practice: Debouncing Queries

? Best Practice: Debounce Queries for User Input

// Good
const { data } = useQuery(['searchResults', debouncedQuery], fetchSearchResults);

// Bad
const { data } = useQuery(['searchResults', userInput], fetchSearchResults);        

Bad Practice: Mixing Queries and Mutations in One File

? Pitfall: Mixing queries and mutations in the same file can lead to confusion and make your code harder to understand.

// Avoid this approach
import { useQuery, useMutation } from 'react-query';

export const useUserData = () => {
  return useQuery('userData', () => fetchUserData());
};

export const useUpdateUserData = () => {
  return useMutation((updatedData) => updateUser(updatedData));
};        

Bad Practice: Overusing refetch

? Pitfall: Avoid Unnecessary Refetching

// Bad
const { data, refetch } = useQuery('userData', fetchUserData);

// Unnecessary refetch triggering
const handleDataUpdate = () => {
  // ...some logic
  refetch();
};        

Remember, optimizing React Query usage leads to better performance and a smoother user experience. Share your tips and experiences in the comments! Let's discuss and learn together. ???? #ReactQuery #WebDevelopment #BestPractices