How Can I Prevent Image Overlap When Changing Images on Hover with CSS or JavaScript?

Customizing Image Appearance on Hover with HTML, CSS, and JavaScript

When dealing with image transitions on hover, you may encounter a common issue where the underlying image remains visible and the updated image doesn't adjust to the desired height and width, causing an overlap.

In your code snippet:

<img src="LibraryTransparent.png">

#Library {
    height: 70px;
    width: 120px;
}

#Library:hover {
    background-image: url('LibraryHoverTrans.png');
    height: 70px;
    width: 120px;
}

Your attempt to change the background image is correct. However, to address the height and width issues, you can use the following CSS properties within the :hover selector:

#Library:hover {
    background-image: url('LibraryHoverTrans.png');
    height: 70px;
    width: 120px;
    background-size: cover;
}

The background-size: cover property ensures that the updated image fills the entire space of the element, preventing overlap.

Alternatively, you could employ JavaScript to handle the image transition. This approach allows you to directly change the src attribute of the image:

<img src="LibraryTransparent.png" onmouseover="this.src='LibraryHoverTrans.png'" onmouseout="this.src='LibraryTransparent.png'" />

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