It was also common, though not strictly required, to spread the code for one feature across multiple files like actions/todos.js, constants/todos.js, and reducers/todos.js.Īdditionally, store setup usually required a series of steps to add commonly used middleware like thunks and enable Redux DevTools Extension support, even though these are standard tools used in almost every Redux app. Immutable updates required a lot of hand-written object spreads and array operations, and it was very easy to make mistakes and accidentally mutate state in the process (always the #1 cause of Redux bugs!). None of this code specifically depends on any API from the redux core library. You'd also probably have hand-written action creators and action type constants along with it: Prior to Redux Toolkit, you'd typically write that reducer with a switch statement and manual updates. The bad news is that there are no helpers to make any of your code easier to write.įor example, a reducer function is just a function. The good news is that this means Redux can be used in many different ways. Other than that, all the other Redux-related logic in your app has to be written entirely by you. compose to combine multiple store enhancers into a single store enhancer.applyMiddleware to combine multiple middleware into a store enhancer.combineReducers to combine multiple slice reducers into a single larger reducer.createStore to actually create a Redux store.The Redux core is a very small and deliberately unopinionated library. TypeScript types for actions, state, and other functionsĪdditionally, Redux is normally used with the React-Redux library to let your React components talk to a Redux store.The Redux DevTools Extension to view your action history and state changes.Memoized selector functions with the Reselect library for optimizing derived data.Normalized state to enable looking up items by ID.Thunk functions that contain sync or async logic with side effects.Action creators that generate those action objects.While it's not required, your Redux code also normally includes: Pure reducer functions looking at those actions and returning immutably updated state.Dispatching plain object actions to the store when something happens in the app.A single store containing "global" state.The first thing to ask is, "what is Redux?" How Redux Toolkit Is Different Than the Redux Core What Is "Redux"? Using Redux: Migrating to Modern Redux, which covers how to migrate different kinds of legacy Redux logic into modern Redux equivalents.Redux Fundamentals, Part 8: Modern Redux with Redux Toolkit, which shows how to convert the low-level examples from earlier sections of the tutorial into modern Redux Toolkit equivalents.The "Redux Essentials" tutorial, which teaches "how to use Redux, the right way" with Redux Toolkit for real-world apps,.Most likely, you'll also need the React bindings and the developer tools.See these pages to learn how to use "modern Redux" with Redux Toolkit: You don't need to use Babel or a module bundler to get started with Redux. The Redux source code is written in ES2015 but we precompile both CommonJS and UMD builds to ES5 so they work in any modern browser. The UMD builds make Redux available as a window.Redux global variable. For example, you can drop a UMD build as a tag on the page, or tell Bower to install it. They can be used directly without a bundler and are thus compatible with many popular JavaScript module loaders and environments. The redux npm package includes precompiled production and development UMD builds in the dist folder. If you don't use a module bundler, it's also fine. If you like to live on the edge and use Rollup, we support that as well. These modules are what you get when you import redux in a Webpack, Browserify, or a Node environment. Most commonly, people consume Redux as a collection of CommonJS modules. If you're not, you can access these files on unpkg, download them, or point your package manager to them.
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