Why Does My Image Have Unexpected White Space Below It After Switching from a Background Image?

Mystery White Space Beneath Image Tag: Troubleshooting Hidden Line Descent

The mysterious white space appearing beneath an image after switching from a background image to an tag can be attributed to a subtle technicality in HTML and CSS.

The original background image is not a text element, so it doesn't adhere to the rules of vertical alignment. In contrast, inline elements like images align to the baseline, a reference line that accommodates the descent of letters like "g" and "y."

This descent creates a subtle gap beneath the image, which is not caused by margin or padding but is simply an artifact of baseline alignment.

Resolving the White Space:

To eliminate the white space, consider the following solutions:

• Vertical-align: bottom: Adjust the vertical alignment of the image to the bottom of its container, ensuring it doesn't extend beyond the container's edge.
• Display: block: Switch the image's display mode to block, which removes its inline behavior and allows it to fill the available space.
• Line-height: 0: Set the line-height of the container to zero, effectively eliminating any vertical space allocated for line descent.
• Font-size: 0: Set the font-size of the container to zero, which removes the line descent without affecting the child element's font-size (if necessary).

By addressing the underlying cause of the white space, one of these methods will successfully resolve the issue and align the image properly within its container.

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