How to Update Cart Items' Quantity and Price in React Native using Redux Toolkit

Learn how to efficiently update cart item quantities and prices using Redux Toolkit in your React Native application with a clear step-by-step guide.
---
This video is based on the question https://stackoverflow.com/q/67248791/ asked by the user 'anie' ( https://stackoverflow.com/u/11420655/ ) and on the answer https://stackoverflow.com/a/67254767/ provided by the user 'yudhiesh' ( https://stackoverflow.com/u/13337635/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Update cart items quantity and price with @ reduxjs/toolkit in react native

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Update Cart Items' Quantity and Price in React Native using Redux Toolkit

Managing cart state can be a bit challenging, especially when you're just starting with React Native and Redux Toolkit. One commonly faced issue is updating the quantity and total price of items in your cart when users interact with it. In this guide, we'll go through a simple way to manage your cart state effectively, allowing you to increment and decrement item quantities seamlessly.

Problem Overview

Let's say you have a cart state that holds an array of items. Each item is an object that contains properties like Id, duration, name, price, qty, and total. Below is a sample structure of your cart state:

[[See Video to Reveal this Text or Code Snippet]]

You have created some reducers to add and remove items from the cart:

addItemToCart: Adds an item to the cart.

removeItemFromCart: Removes an item based on its ID.

However, you are uncertain about how to handle increasing and decreasing the item quantity and updating the total price accordingly. Don’t worry, we will break this down step-by-step!

Solution Overview

We will use two new reducers: addQuantityToItem and subtractQuantityFromItem to manage quantity changes. Here’s how to implement them effectively.

Step 1: Modify the Reducers

To begin with, you'll need to modify your cartSlice reducers to include logic for increasing and decreasing item quantities. Here’s a refined version of your cart slice:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Use the Modify Reducers in Your Component

Now that we have the reducers setup, let's incorporate them into your component. Here’s an example of how you can implement the increment and decrement actions in your cart screen using TouchableOpacity:

[[See Video to Reveal this Text or Code Snippet]]

Summary

To recap, the overall steps to manage cart item quantities and prices are:

Define the slice and reducers: We added addQuantityToItem and subtractQuantityFromItem to allow modifying quantities.

Update the cart state: We ensured when an item quantity is modified, we appropriately update both the quantity and the total price.

Connect actions to UI: Users can interact with the UI to change quantities, and the state updates accordingly.

By following these steps, you'll have a functional cart system that accurately reflects user interactions and maintains a clear state. Happy coding!

Видео How to Update Cart Items' Quantity and Price in React Native using Redux Toolkit канала vlogize