Скачать или смотреть Change Your Icon Color Based on User Liked Status in React/TypeScript

Learn how to dynamically change the color of SVG icons in your React/TypeScript application based on user interaction, enhancing user experience and visual feedback.
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This video is based on the question https://stackoverflow.com/q/65408813/ asked by the user 'Gavi Schneider' ( https://stackoverflow.com/u/13115329/ ) and on the answer https://stackoverflow.com/a/65409153/ provided by the user 'lissettdm' ( https://stackoverflow.com/u/14349808/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Change Your Icon Color Based on User Liked Status in React/TypeScript

In modern web applications, providing users with visual feedback is crucial for enhancing their experience. One common pattern is changing the color of an icon based on user interactions, such as liking or upvoting a post. In this guide, we’ll tackle a specific problem: how to change the color of an SVG icon in a React/TypeScript application based on whether a user has already liked (or upvoted) a particular item.

The Problem

You have an Upvote component where users can upvote posts. The icon representing the upvote is sourced from the react-icons library. When users click on the icon, its color changes appropriately (e.g., to red). However, there’s a twist: you want the icon to reflect the current 'liked' status when the component first renders. The challenge here is that you need to change the icon's fill based on a boolean property (upvoted) without relying on user interaction.

Understanding the Code

Here’s a quick overview of your Upvote component as it currently stands:

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

As it stands, whenever a user clicks the icon, you change its color dynamically using JavaScript. Now, let's see how we can implement the desired change based on the upvoted state.

The Solution

To address this issue, we can utilize React's ref to reference the icon directly. This allows us to manipulate the SVG path and change its color based on the upvoted state within a useEffect hook that responds to changes in that state.

Step-by-Step Implementation

Import Required Hooks: Make sure to import useRef from React.

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Create a ref for the Icon: Initialize a ref inside your component.

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Update useEffect for Icon Color Change: Add another useEffect that will run whenever the upvoted state changes. If upvoted is true, you should set the fill of the icon to red.

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

Attach the ref to the Icon Container: Finally, ensure that the ref is connected to the outer div that wraps the icon.

The Complete Code

Here’s how your modified Upvote component would look:

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

Conclusion

By utilizing useRef and useEffect, you can dynamically change the fill color of an SVG icon based on the user's interaction state. This allows the icon to accurately reflect whether the user has upvoted a post even before any interaction occurs. Incorporating this functionality improves user experience and provides immediate visual feedback, making your application feel more responsive and intuitive.

Remember to adapt this approach to fit the specifics of your application's architecture and styling needs! Happy coding!