How to Use useEffect to Change Button Icon on Cursor Hover in React

Learn how to easily change the button icon on mouse hover using React's `useEffect`. This step-by-step guide will help you understand the process in simple terms.
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How to Use useEffect to Change Button Icon on Cursor Hover in React

React is a powerful JavaScript library for building user interfaces, and it offers a variety of hooks to help developers manage component state and side effects. One common user interaction is changing the visual state of a button when a user hovers their cursor over it. In this guide, we’ll explore how to change the icon of a button on cursor hover using the useEffect and useState hooks.

The Problem: Changing Button Icons on Hover

Imagine you have a button that allows users to add items to their basket, represented by a plus icon. However, when the user hovers over this button, you may want to change the icon to something like a minus icon, indicating that they can remove the item. This interaction can enhance user experience, making the action feel more intuitive.

In React, we can achieve this effect easily using the useState and useEffect hooks.

The Solution: Implementation Step-by-Step

1. Set Up State for Icon Change

First, you'll want to maintain a piece of state to manage the icon being displayed. You can use the useState hook for this purpose.

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

In this code snippet:

icon is the current icon state, and it starts with plusCart, which is the initial icon representing adding an item to the basket.

setIcon is the function used to update the icon state.

2. Define Your Button Component

Next, let’s set up the Button component using the icon state. Here's how this looks:

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

Breakdown:

style sets the button's background to transparent.

type specifies the button type (in this case, primary).

icon will render the current state of the icon.

onClick handles the click event for adding to the basket.

onMouseEnter and onMouseLeave are crucial:

onMouseEnter: This event triggers when the cursor hovers over the button, changing the icon to minusCart.

onMouseLeave: This event triggers when the cursor leaves the button, reverting back to plusCart.

3. Complete Example

Here's the complete React component example encapsulated in a functional component:

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

Conclusion

With just a few lines of code, you can create an interactive button that visually responds to user actions. By utilizing React's useState and event handlers, you enhance the user interface, making it more engaging and intuitive.

Feel free to customize the icons and actions based on your application's needs. Happy coding!