Скачать или смотреть How to Make Buttons Act as Radio Buttons in React.js by Changing States

Learn how to implement button-based selection in a React.js app, mimicking radio button behavior effectively to improve your user experience.
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This video is based on the question https://stackoverflow.com/q/62825683/ asked by the user 'Armin Mohamed' ( https://stackoverflow.com/u/7341541/ ) and on the answer https://stackoverflow.com/a/62825729/ provided by the user 'dave' ( https://stackoverflow.com/u/2082673/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Make Buttons Act as Radio Buttons in React.js by Changing States

If you're diving into React and want to create a dynamic interface, you might face a common challenge: making buttons act like radio buttons. This approach is especially useful when you're developing interactive applications, like a pathfinding visualizer, where you want to let users select from multiple options without the usual radio button UI. Here’s how to solve this issue effectively.

Understanding the Problem

You are building an application to visualize pathfinding algorithms and wish to allow users to select one active algorithm at a time using buttons. You already have a structure in place but are encountering an error: "Maximum update depth exceeded."

This error typically arises when a component continuously calls setState during its rendering process, prompting an infinite loop of updates. Understanding the flow of data and how functions are triggered is key to resolving this issue.

Breaking Down the Solution

The Current Implementation

In your Options component, you are handling button states using a constructor that initializes an object with boolean values—representing whether each algorithm is active. The handleClick function modifies this state when a button is clicked:

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

The Issue in Button Component

In your Button component, you set the onClick property directly in this manner:

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

This instantly invokes the onClick function instead of passing a reference to it, creating an issue where setState triggers again and again when React renders the button.

The Fix

To resolve this issue and ensure that the onClick function only executes when the button is clicked (and not during render), you should modify it to use an arrow function. This effectively allows React to treat it as a reference rather than invoking it immediately.

Here’s the corrected line of code:

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

Complete Example

Together, your Options and Button components would look like this:

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

Conclusion

By implementing these changes, your buttons should now function like radio buttons, activating one algorithm at a time without causing infinite loops. This enhancement in your React application not only improves functionality but also provides a better user experience.

Feel free to reach out for any further clarifications or to explore more advanced state management techniques in React!