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It replaced the legacy context API, which had been available since early versions of React, but had major design flaws. The current React Context API ( React.createContext()) was first released in React 16.3. Notice that it does not say anything about "managing" values - it only refers to "passing" and "sharing" values. Context provides a way to share values like these between components without having to explicitly pass a prop through every level of the tree. locale preference, UI theme) that are required by many components within an application. In a typical React application, data is passed top-down (parent to child) via props, but this can be cumbersome for certain types of props (e.g. Let's start by looking at the actual description of Context from the React docs:Ĭontext provides a way to pass data through the component tree without having to pass props down manually at every level. So, in order to actually know when to use them, we need to first clearly define what they do and what problems they solve. Most of the confusion over "Context vs Redux" stems from a lack of understanding about what these tools actually do, and what problems they solve. It's also critical to understand what problems you are trying to solve in your own application right now, and pick the tools that solve your problem the best - not because someone else said you should use them, not because they’re popular, but because this is what works best for you in this particular situation. In order to use any tool correctly, it's critical to understand: Purposes and Use Cases for (React-)Redux.You need more powerful capabilities for managing side effects, persistence, and data serialization.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.The app has a medium or large-sized codebase, and might be worked on by many people.
#Mobx vs redux update#
The logic to update that state may be complex.The app state is updated frequently over time.You have larger amounts of application state that are needed in many places in the app.When you have moderately complex React component state management needs within a specific section of your application. When should I use Context and useReducer? ?︎ When should I use Context? ?︎Īny time you have some value that you want to make accessible to a portion of your React component tree, without passing that value down as props through each level of components. They have some similarities and overlap, but there are major differences in their capabilities. Are Context and useReducer a replacement for Redux? ?︎ Any "state management" is done by you and your own code, typically via useState/useReducer. It is a transport mechanism - it doesn't "manage" anything. Context is a form of Dependency Injection. Is Context a "state management" tool? ?︎ They are different tools that do different things, and you use them for different purposes. TL DR ?︎ Are Context and Redux the same thing? ?︎ I'll try to clarify what Context and Redux actually are, how they're meant to be used, how they're different, and when you should use them.
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Given the prevalence of questions on this topic, I'm putting together this post as a definitive answer to those questions. I've answered various questions about Context and Redux hundreds of times across the internet (including my posts Redux - Not Dead Yet!, React, Redux, and Context Behavior, A (Mostly) Complete Guide to React Rendering Behavior, and When (and when not) to Reach for Redux), yet the confusion continues to get worse.
![mobx vs redux mobx vs redux](https://i1.wp.com/programmingwithmosh.com/wp-content/uploads/2019/01/Redux.png)
Sadly, most of this "debate" stems from confusion over the purpose and use cases for these two tools. "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. This is a post in the Blogged Answers series.ĭefinitive answers and clarification on the purpose and use cases for Context and Redux