RTK Query

RTK Query Overview

At its core, rtk query is about doing one thing well in Redux. Once you understand the pattern, you can apply it consistently across projects and teams.

Good rtk query pays off across the whole project: fewer surprises, easier collaboration, and smoother onboarding. The snippet below is a solid starting point.

import { createApi, fetchBaseQuery } from '@reduxjs/toolkit/query/react';

export const api = createApi({
  reducerPath: 'api',
  baseQuery: fetchBaseQuery({ baseUrl: '/api' }),
  endpoints: (builder) => ({
    getUsers: builder.query({ query: () => 'users' }),
    addUser: builder.mutation({
      query: (body) => ({ url: 'users', method: 'POST', body }),
    }),
  }),
});

export const { useGetUsersQuery, useAddUserMutation } = api;

RTK Query handles data fetching, caching, and auto-generated React hooks for you.

RTK Query Example

const slice = createSlice({ name, initialState, reducers });
const store = configureStore({ reducer: { key: slice.reducer } });
// dispatch(slice.actions.something())

• Start from a minimal RTK Query example and grow it only as needed.
• Keep things explicit so RTK Query behaves the same for everyone on the team.
• Name things clearly so teammates understand your RTK Query at a glance.
• Verify RTK Query works as expected before relying on it in important work.

Redux Cheatsheet

Quick Redux Toolkit reference related to rtk query.

How RTK Query Works in Redux

RTK Query follows Redux's predictable data flow: components dispatch actions, reducers compute the next state from the previous state and the action, and subscribed components re-render.

RTK Query handles data fetching, caching, and auto-generated React hooks for you.

• State lives in a single, read-only store.
• Actions are the only way to describe a change.
• Reducers are pure functions that return the next state.
• Redux Toolkit removes most boilerplate with slices and thunks.

Practical Guidance for RTK Query

In modern apps, rtk query should use Redux Toolkit rather than hand-written Redux. Keep state minimal, colocate logic in slices, and use RTK Query for server data.

Common Mistakes

• Copying rtk query commands or snippets without understanding what each part does.
• Skipping edge cases and error handling when using rtk query.
• Not verifying the result of rtk query before moving on.
• Over-complicating rtk query before you actually need the extra flexibility.

Key Takeaways

• RTK Query is a core part of working effectively with Redux.
• Start small and keep rtk query focused on a single goal.
• Apply consistent patterns so rtk query scales across your project.
• Practise and document rtk query to keep your workflow maintainable.