RTK-Query

Powerful data fetching & caching tool for Redux

Crash Course!

What

What is RTK Query

Powerful data fetching & caching tool to simplify common cases & eliminate the need to hand-write the logic yourself"

Redux Toolkit Stats

No Item Description
1. Total Commits 1,043
2. Last Commit 3 hours ago
3. Opened Issues 78 out of 831
4. Opened Pull Requests 17 out of 554
5. Total Stars 6.2k
6. Total Fork 473
7. First Public Release 24 Dec 2018 (v0.3.0)
8. Latest version v1.6.1

Contributers

Why

Motivation

Creator of Redux 

Motivation

Redux rules:

  • Make immutable operations to modify state
  • Derive new state based on dispatched action
  • No asynchronous logic or 'side effects'

Redux knows to synchronously dispatch actions, update the states and notify the UI that something changed. However, any asynchronous operations have to happen outside the store.

RTK Query

RTK Query is an optional addon included in Redux Toolkit (RTK) and its functionality is seamlessly integrated in the RTK API.

  • Tracking loading state to show UI spinners
  • Avoiding duplicate requests for same data
  • Optimistic updates to make UI feel faster
  • Managing cache as user interacts with UI

Solve common data fetching behaviors:

Comparing Data Fetching & Caching library

Item React Query SWR  Apollo Client  RTK-Query 
Last Commits 9 hours ago 24 hours ago 9 hours ago ❤️8 hours ago
No of Commits 1,325 450 ❤️ 9,932 1,049
No of Stars ❤️ 22.5k 18.9k 16.7k 6.2k
First version 11 Sept 2019 30 Oct 2019 ❤️ 14 Apr 2016 7 June 2021
No of Issues
( Opened / Closed )		 77 / 763  47 / 418  ❤️ 345 / 3,507  77 / 763
No of PR
( Opened / Closed )		 11 / 755 15 / 467 ❤️96 / 4,449 17 / 541
Platform Requirements React React React, GraphQL Redux
Supported Query Syntax Promise, REST, GraphQL Promise, REST, GraphQL GraphQL Promise, REST, GraphQL
Supported Query Keys JSON JSON GraphQL Query JSON
Change Detection Deep Compare (Stable Serialization) Shallow Compare Deep Compare (Unstable Serialization) Referential Equality (===)
API Definition On-Use, Declarative On-Use GraphQL Schema Declarative

NPM Trends Data Fetching & Caching library

  • ✅ 1st-class, built-in, and ready to use with no added configuration or code
     
  • 🟡 Supported, but as an unofficial 3rd party or community library/contribution
     
  • 🔶 Supported and documented, but requires extra user-code to implement
     
  • 🛑 Not officially supported or documented.

Comparing Data Fetching & Caching library

React Query SWR  Apollo Client  RTK-Query 
Caching ✅ ✅ ✅ ✅
Devtools ✅ 🟡 ✅ ✅
Polling/Intervals ✅ ✅ ✅ ✅
Parallel Queries ✅ ✅ ✅ ✅
Dependent Queries ✅ ✅ ✅ ✅
Paginated Queries ✅ ✅ ✅ ✅
Infinite Queries ✅ ✅ ✅ 🛑
Bi-directional Infinite Queries ✅ 🔶 🔶 🛑
Infinite Query Refetching ✅ ✅ 🛑 🛑
Lagged Query Data ✅ 🔶 🛑 ✅
Selectors ✅ 🛑 ✅ ✅
Initial Data ✅ ✅ ✅ ✅
Scroll Recovery ✅ ✅ ✅ ✅

Comparing Data Fetching & Caching library

React Query SWR  Apollo Client  RTK-Query 
Cache Manipulation ✅ ✅ ✅ ✅
Outdated Query Dismissal ✅ ✅ ✅ ✅
Render Batching & Optimization ✅ 🛑 🛑 ✅
Auto Garbage Collection ✅ 🛑 🛑 ✅
Mutation Hooks ✅ 🟡 ✅ ✅
Offline Mutation Support ✅ 🛑 🟡 🛑
Prefetching APIs ✅ 🔶 ✅ ✅
Query Cancellation ✅ 🛑 🛑 🛑
Partial Query Matching3 ✅ 🛑 🛑 ✅
Stale While Revalidate ✅ ✅ ✅ ✅
Stale Time Configuration7 ✅ 🛑 🛑 ✅

Comparing Data Fetching & Caching library

React Query SWR  Apollo Client  RTK-Query 
Pre-usage Query/Mutation Configuration ✅ 🛑 🛑 ✅
Window Focus Refetching ✅ ✅ 🛑 ✅
Network Status Refetching ✅ ✅ ✅ ✅
General Cache Dehydration/Rehydration ✅ 🛑 ✅ ✅
Offline Caching ✅ (Experimental) 🛑 ✅ 🔶
React Suspense (Experimental) ✅ ✅ 🛑 🛑
Abstracted/Agnostic Core ✅ 🛑 ✅ ✅
Automatic Refetch after Mutation 🔶 🔶 ✅ ✅
Normalized Caching 🛑 🛑 ✅ 🛑

Comparing Data Fetching & Caching library

How

Overview Concept

Setup

> npm install @reduxjs/toolkit redux react-redux

1. Add the Redux Toolkit and React-Redux packages to your project:

// app/store.js
import postsReducer from '../features/posts/postsSlice'
import usersReducer from '../features/users/usersSlice'
import notificationsReducer from '../features/notifications/notificationsSlice'
import { configureStore } from '@reduxjs/toolkit'

export default configureStore({
  reducer: {
    posts: postsReducer,
    users: usersReducer,
    notifications: notificationsReducer,
  }
})

2. Create an Redux Store

Setup

3. Provide the Redux Store to React

 

Create a Counter state

4. Create a redux state api

Create a Counter state

5. Add API slice to Store

Use Redux State & Actions

import { useGetPostsQuery } from '../api/apiSlice'

export const PostsList = () => {
  const {
    data: posts,
    isLoading,
    isSuccess,
    isError,
    error
  } = useGetPostsQuery()

  let content

  if (isLoading) {
    content = <Spinner text="Loading..." />
  } else if (isSuccess) {
    content = posts.map(post => <PostExcerpt key={post.id} post={post} />)
  } else if (isError) {
    content = <div>{error.toString()}</div>
  }

  return (
    <section className="posts-list">
      <h2>Posts</h2>
      {content}
    </section>
  )
}

let PostExcerpt = ({ post }) => {
  return (
    <article className="post-excerpt" key={post.id}>
      <h3>{post.title}</h3>
      <div>
        <PostAuthor userId={post.user} />
        <TimeAgo timestamp={post.date} />
      </div>
      <p className="post-content">{post.content.substring(0, 100)}</p>

      <ReactionButtons post={post} />
      <Link to={`/posts/${post.id}`} className="button muted-button">
        View Post
      </Link>
    </article>
  )
}

Demo

Resources

Websites  

RTK-Query, React-Query, SWR, Apollo-Client

Articles

Comparison Page

RTK-Query: data fetching & caching tool for Redux

By Wan Mohd Hafiz

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