Centrally manage React states with Context

React context hook can help simplify the ‘props chain’ situation where we have cross-component states and need to pass them using props through several layers of components without actually needing them along the way.

Take a look at this App component which has userName

In theHome component which does not really need userName, but it has a child component, Form, which requires userName. In this case, Home component has to receive the userName from props and pass it on to Form, which could be redundant and confusing.

React context helps manage cross-component states by having a centralised place for state management, and avoiding props chain.

Create a context file in your project at your preferred path, for example, src/store/user-context.js. Note that I named the file user-context as it’ll store user data.

I will use the same example as above. We would like to pass userName from the App component to the Form component. With context provider, you only need to pass userName to the UserContext to be consumed anywhere.

In the Form component where we want to consume the userName (not stored as name in the UserContext), create a variable with the useContext() hook as in the example and access any stored value directly.

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