How to Dynamically Render SVG Icons in React Based on Component Props

Learn how to change a specific part of a React component's rendering based on props, specifically customizing an icon's color based on an online status.
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Rendering a Part of a Component Through Function in React JS

As developers, we often encounter scenarios where we want to render only a specific part of a component dynamically. If you're learning ReactJS, you may have come across a situation similar to this: You have a component that displays an online status and you want to change the color of an icon based on whether the status is true or false. In this guide, we'll explore how to implement this in a structured, straightforward manner.

The Problem

Let’s consider a React component where you’re displaying the online status with an accompanying icon. You receive this status through props, and depending on whether the user is online or offline, you want to render either a green or red circle icon right next to the “Online” text. The challenge is that you want to change only the icon color dynamically—not the entire component.

Here’s the original code snippet:

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

The Solution

To address this problem, we can create a function that returns the appropriate color for the CircleFill icon based on the online status passed through props. Let’s break down the solution into simple steps.

Step 1: Create a Function to Determine Icon Color

You can define a function called circleColor that checks the prop for the online status and returns the correct icon accordingly:

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

Step 2: Integrate the Function into Your Component

You can call this function in your component’s return statement where you want the icon to appear. Replace the existing placeholder comments with a call to circleColor and pass the props:

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

Alternative Method: Use Ternary Operator

For a more concise approach, you can simplify the circleColor function using a ternary operator:

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

This single line achieves the same outcome by making your code even cleaner and easier to read.

Conclusion

By following the method outlined above, you’ll gain the ability to dynamically render parts of your components based on props while keeping your code organized and maintainable. This method not only enhances the interactivity of your components but also helps reinforce good coding practices in React. Happy coding!