Redux & Redux Toolkit Course
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Redux Code Splitting

Definition

Applying Webpack/Vite code-splitting techniques to Redux logic, ensuring that action creators, selectors, and reducers are only downloaded by the user's browser when they are actually needed.

Explain Like I'm New

Instead of forcing the user to download a 5MB `bundle.js` file before they can see your homepage, you break the app into 100kb chunks. The Redux logic for the Admin Panel is kept in a separate file and only downloaded if an Admin logs in.

Real World Example

Using RTK Query's `injectEndpoints`. You define an empty `apiSlice` on boot. As the user navigates the app, different pages inject their specific endpoints into the core API slice.

Common Use Cases

  • •Improving Time-To-Interactive (TTI) metrics
  • •Performance optimization

Interactive Example

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Interview Questions

basic

  • Is Redux Code Splitting necessary for small applications?

intermediate

  • How does RTK Query support code splitting?

Flash Cards

Question

Necessary for small apps?

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Answer

No. The complexity of managing dynamically injected reducers vastly outweighs the benefits unless your JavaScript bundle size is massive.

Question

RTK Query support?

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Answer

Using the `.injectEndpoints()` method. It allows you to add new API calls to an existing API slice from a completely different file.