Скачать или смотреть How to Update Multiple Components in React Based on Dropdown Selection

Discover how to effectively update multiple components in React when a dropdown option is selected using state management techniques.
---
This video is based on the question https://stackoverflow.com/q/64018062/ asked by the user 'kb_' ( https://stackoverflow.com/u/11087776/ ) and on the answer https://stackoverflow.com/a/64018180/ provided by the user 'Besufkad Menji' ( https://stackoverflow.com/u/10239185/ ) 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: react update mutiple components when option is selected

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

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Update Multiple Components in React Based on Dropdown Selection

As a developer, you may face the challenge of updating multiple components in your React application when the user makes a choice from a dropdown menu. This is a common requirement, especially in cases like language selection where text needs translation based on user preference. In this guide, we'll explore how to implement this functionality using React state management techniques.

The Problem Statement

Imagine you have a dropdown component that allows users to select a language. You want to ensure that all components on the page reflect this language change instantaneously. This may seem daunting, but with React's state management capabilities, it can be done efficiently.

Initial Code Overview

You might start with a dropdown structured similar to the following snippet, which selects a language and stores it in localStorage:

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

Here’s how to modify this setup so that all Translator components update when the user selects a different language.

Implementing the Solution

Step 1: Use State Management

To keep track of the selected language, we need to use the useState hook to create a state variable. This variable will dynamically hold the current language selection.

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

Step 2: Retrieve Initial Language Setting

Utilizing the useEffect hook, we can set the initial language from localStorage when the component mounts.

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

Step 3: Create the Dropdown Component

Modify the dropdown to update the value state whenever a new language is selected. You also want to ensure that your dropdown reflects the current language correctly.

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

Step 4: Updating Multiple Components

Next, ensure each instance of the Translator component reads from the value state for the to prop.

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

Complete Modified Code

Here's how the complete component would look:

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

Conclusion

By using useState to manage the current language selection and useEffect to retrieve the initial setting, we have made our dropdown functional and able to update multiple components efficiently. This approach not only enhances user experience but also keeps your code organized and maintainable.

Implement the above suggestions in your React application for a seamless language selection experience!