As one user recently told me: We just switched from context and hooks over to RTK on one of our production application's frontends. Managing State in React App is tricky, especially when you want to share data from component 1 to (x)components, you will have to pass the data from component 1, 2 to 7 which is basically unnecessary. ... React Context will trigger a re-render on each update, and optimizing it manually can be really tough. At a high level, we can say, Redux is far from dead or be killed by React Context & still it is one of the greatest solutions towards props drilling even it requires a bunch of libraries. Instead, it assumes that some parent component will pass down that value, at runtime. React context, on the other hand, works on the state principle which is already a part of React, we only need to understand the additions to the API and how we can use the providers and consumers. Context provides a way to pass data through the component tree without having to pass props down manually at every level. It is a transport mechanism - it doesn't "manage" anything. Its really simple, right? Even when you are looking at the App Component and you know there is a problem in one of the properties of state, but you have to look at all the components which are Consuming it to figure out which one of them caused the problem. For example if you want to store user data in your app then you manually need to pass it from parent to child and in case no of child tree is too much it become really difficult to handle because some time middle child don’t even use that data. Reduce React State with Hooks and Context. React Context for State Management React 16.3 added a new Context API – new in the sense that the old context API was a behind-the-scenes feature that most people either didn’t know about, or avoided using because the docs said to avoid using it. I.e. Using React Context in an app requires a few steps: Whenever the parent component re-renders and passes in a new reference to the context provider as the value, any component that reads from that context will be forced to re-render. Context Vs Props in React. They are different tools that do different things, and you use them for different purposes. The actual behavior of the app would have been the same overall. (And maybe, just maybe, some folks will read this article and not feel the need to post the same question that's been asked a million times already...). So, let's talk about the Context + useReducer combination specifically. Now we have to connect Redux with React. React's Context API has become the state management tool of choice for many, oftentimes replacing Redux altogether. So we don’t need to install any extra packages for managing packages. Let's review what capabilities Context and React+Redux actually have: So, clearly these are very different tools with different capabilities. The main reason to introduce the Context API to manage the props and states globally. Redux also uses middleware as a way to extend the capabilities of the Redux store, including handling side effects. Note: This article covers only the context API. So, you can use Redux for some state that's global, and useReducer + Context for some state that's more local, and Context by itself for some semi-static values, all at the same time in the same application. Let's start by looking at the actual description of Context from the React docs: Context provides a way to pass data through the component tree without having to pass props down manually at every level. Denny Scott: Redux vs Context vs State - an in-depth look at state management in React, Maximilian Schwarzmüller: Redux vs React's Context API, Jakob Lind: When to use Redux, Context, and props, Blogged Answers: Why React Context is Not a "State Management" Tool (and Why It Doesn't Replace Redux), Presentations: Intro to React, Redux, and TypeScript (2020), Presentations: Podcast Appearances in 2020, Coding Career Advice: Searching and Evaluating Online Information Efficiently, How Web Apps Work: AJAX, APIs, and Data Transfer, Greatest Hits: The Most Popular and Most Useful Posts I've Written, Global React Meetup: The State of Redux 2020, The History and Implementation of React-Redux, Thoughts on React Hooks, Redux, and Separation of Concerns, React Boston 2019: Hooks HOCs, and Tradeoffs, You have larger amounts of application state that are needed in many places in the app, The app state is updated frequently over time, The logic to update that state may be complex, The app has a medium or large-sized codebase, and might be worked on by many people, You want to be able to understand when, why, and how the state in your application has updated, and visualize the changes to your state over time, You need more powerful capabilities for managing side effects, persistence, and data serialization, Then, in any component nested inside that provider, call, says that the purpose of Redux is to help you understand how state changes over time, Wanting to write your state management logic completely separate from the UI layer, Sharing state management logic between different UI layers (such as an application that is being migrated from AngularJS to React), Using the power of Redux middleware to add additional logic when actions are dispatched, Being able to persist portions of the Redux state, Enabling bug reports that can be replayed by developers, Faster debugging of logic and UI while in development, store an initial value by calling the hook, read the current value, also by calling the hook, Know that the value has been updated because the component re-rendered, Redux stores an initial value by calling the root reducer, lets you read the current value with, MobX stores an initial value by assigning field values in a store class, lets you read the current value by accessing the store's fields, updates values by assigning to those fields, and notifies that changes happened via, Passes down a single value, which could be anything (primitive, objects, classes, etc), Does show the current context value for both, Updates consuming components when the context value changes, but with no way to skip updates, Does not include any mechanism for side effects - it's purely for rendering components, Stores and manages a single value (which is typically an object), Works with any UI, including outside of React components, Can update the value via dispatching an action and running reducers, Has DevTools that show the history of all dispatched actions and state changes over time, Uses middleware to allow app code to trigger side effects, Allows components to subscribe to store updates, extract specific pieces of the store state, and only re-render when those values change, a way to pass down that value and read it in nested components, Passing down a value to nested components without prop-drilling, Moderately complex React component state management using a reducer function. So create a file UserContext.js in the root of /src folder. In this article, we're going to manage our state with React context, to see by ourselves if it's better than redux regarding state's management. The actual Redux store is injected into the tree at runtime using the React-Redux component. In this article, we share a short overview of state management, context API, and Flux architecture. So finally we have used context data & update as well. For the last few years, Redux has been THE state management solution for bigger React apps. This happens to be the case where we use websockets to fetch some sort of real-time data, such as market price data. We could divide that into categories like "server state", "communications state", and "location state" if we want to, but the key point is that there is data being stored, read, updated, and used. In my opinion, a react developer can get familiarized with the concept in a short while Moderately complex React component state management using a reducer function, Moderate to highly complex state management using reducer functions, Traceability for when, why, and how state changed over time, Sharing state management logic between different UI layers, All of the use cases for Redux, plus interacting with the Redux store in your React components, If the only thing you need to do is avoid prop-drilling, then use Context, If you've got some moderately complex React component state, or just really don't want to use an external library, go with Context +, If you want better traceability of the changes to your state over time, need to ensure that only specific components re-render when the state changes, need more powerful capabilities for managing side effects, or have other similar problems, use Redux + React-Redux. Now the input field has become a controlled input field, because the value comes directly from the React managed state and the handler changes the state.We implemented our first managed state with the State Hook in React. To create maintainable software by separating different parts of logic and state into dedicated components is a bit tricky. The React Context API is React’s way of managing state in multiple components that are not directly connected. As I said above, my habit is to use a tool like Redux or Apollo for my data management, my React state handles local information, often UI state, and context handles static data, such as theming. Rather than pass this value down as a prop, explicitly, through every level of the component tree that needs it, any component that's nested inside the can just say useContext(MyContext) to grab the value as needed. We know that our Redux-connected React components need to talk to a Redux store, but we don't know or care which Redux store that is when we define the component. Combine all reducer, though we have only one reducer, but we are following a convention to adapt more reducers later. Redux, however, comes with its own complexities and challenges. "Context vs Redux" has been one of the most widely debated topics within the React community ever since the current React Context API was released. I also did a boilerplate analysis for that refactor and it's actually LESS boilerplate to use the RTK than it is to use the recommended dispatch pattern in contexts. To solve this problem, many developers turned to state management tools like Redux. React-Redux provides a connect function for you to read values from the Redux store. The way components communicate and share state with each other, defines their success story. React Consumer example on CodeSandbox.. First, we create a new context, which we store in NumberContext.This is an object with 2 properties: Provider and Consumer.They’re a matched pair, and they’re born knowing how to communicate with each other (but not with other contexts). in another way, React Context API is a State management tool in the functional components. Depending on what you wanted to achieve, using Redux can be overkill. You may not find this useful when you are using plain react. Having said that, I hope that this post has clarified what these tools actually do, how they're different, and when you should actually consider using them. The connect function takes two arguments, both optional: So we are going to use connect in our App component. The patterns and tools provided by Redux make it easier to understand when, where, why, and how the state in your application is being updated, and how your application logic will behave when those changes occur. We will use a simple example that will help us to understand the main concept of Context. Redux on the other hand needs to install separately. There's too many people out there, too many conflicting ideas, and too much miscommunication and misinformation. According to the docs, I covered the key points in my posts React, Redux, and Context Behavior and A (Mostly) Complete Guide to React Rendering Behavior. — sebmarkbage, Get the latest news on the world of web technologies with a series of tutorial Take a look, WebAssembly Is Fast: A Real-World Benchmark of WebAssembly vs. ES6, Generic Table component with React and Typescript, Most Important Linux Commands for Developers, 10 Lessons That Helped Me Grow As A Developer, How to create Forms for your React/React Native app, Create a Browser with React.js and Electron. With PureComponent and shouldComponentUpdate Hooks can be used, React Context it Redux a feature level than. 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