Скачать или смотреть How to Conditionally Render Components in React on Change Events

Learn how to `conditionally render components` in React using a radio button onChange event. This guide explores a simple approach to managing component visibility based on user input.
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This video is based on the question https://stackoverflow.com/q/64014398/ asked by the user 'Russell' ( https://stackoverflow.com/u/4718335/ ) and on the answer https://stackoverflow.com/a/64014467/ provided by the user 'Dennis Vash' ( https://stackoverflow.com/u/7882470/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Conditionally Render Components in React on Change Events

In the world of React development, one common challenge is managing component visibility based on user actions. A specific use case is to render different components based on which radio button a user selects. For example, if a user selects "School," we want to display a specific component associated with schools. This guide will walk you through how to achieve this effectively.

Understanding the Problem

Let's consider a situation where we have a component named InstitutionType. The task is to render specific data corresponding to the type of institution the user selects via radio buttons. In the existing setup, we are capturing the user's selection but aren't rendering different components conditionally based on that choice.

Here's an outline of the basic structure:

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

The Solution

To conditionally render different components based on the radio button selection, we can use an object to map the state values (representing the selected institution type) to their respective components.

Step-by-Step Implementation

Define a Mapping Object: Create an object that maps the values of the radio buttons to their corresponding components.

Update the Render Method: Use the mapping object in the render method to conditionally display the appropriate component.

Here’s how you can implement this:

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

Key Parts of the Solution

Mapping Object: The SERVICES object contains the components we want to render based on the selected value. This makes it easy to retrieve the appropriate component with SERVICES[this.state.serviceName].

Dynamic Rendering: In the render method, we render the component associated with the selected service name directly using the mapping object, which keeps our code clean and efficient.

Conclusion

Now you have a straightforward way to conditionally render components in React based on user input from radio buttons. This approach not only simplifies your code but also improves the maintainability of your components. Try integrating this method in your React applications to enhance user interaction and component rendering!

Feel free to experiment with this concept, and you can expand it further to manage more complex components or structures as needed.