Redux & Redux Toolkit Course
Redux & Redux Toolkit
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Beginner

Why Use Redux?

Definition

Redux solves the problem of 'Prop Drilling' and state synchronization across deeply nested component trees in large applications.

Explain Like I'm New

In React, data flows down. If a component at the very top has the `user` data, and a component 50 levels deep needs it, you have to pass it down 50 times (Prop Drilling). Redux creates a 'cloud server' for your state. The component 50 levels deep can just reach up to the cloud and grab the `user` data directly.

Real World Example

An e-commerce app. The Navbar needs to show the cart count. The Checkout page needs to show the cart total. The Product page needs a button to add to the cart. Without Redux, syncing this data across totally different pages is a nightmare.

Common Use Cases

  • •Prop drilling prevention
  • •Global state synchronization
  • •Time-travel debugging

Interactive Example

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Interview Questions

basic

  • Should you use Redux for every single project?

intermediate

  • What is 'Prop Drilling'?

Flash Cards

Question

Every project?

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Answer

No! Redux adds a lot of boilerplate code. Dan Abramov (the creator of Redux) famously wrote an article titled 'You Might Not Need Redux'. Use it only when local component state becomes too hard to manage.

Question

Prop Drilling?

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Answer

The painful process of passing data from a parent component down through multiple layers of intermediate children components just to reach a deeply nested child that actually needs the data.