Why is There Unexpected Spacing Below My Images, Even with Zero Padding and Margin?

Unexpected Spacing Beneath Images: Causes and Resolution

Despite applying padding and margin values of zero, images inexplicably display an empty space underneath them. This puzzling issue arises from the inherent behavior of images, which are treated as characters within inline-block elements.

As characters, images align to the baseline, a line established for text characters to maintain consistency. However, specific letters like "q" and "j" possess descenders that extend below the baseline. To prevent collisions with subsequent lines, space is reserved beneath the baseline.

This diagram illustrates the various lines governing text alignment:

[Insert baseline diagram from WHATWG]

Therefore, images align to the baseline even in the absence of text. To remedy this situation, a simple CSS adjustment can be implemented:

img {
  vertical-align: bottom;
}

This modification aligns the image to the bottom of the line, eliminating the mysterious space. However, when dealing with small images (shorter than the line height), additional space may appear above the image. To resolve this, assign line-height: 1px; to the container element.

This comprehensive explanation and solution should address the concerns of many who have encountered similar issues.

The above is the detailed content of Why is There Unexpected Spacing Below My Images, Even with Zero Padding and Margin?. For more information, please follow other related articles on the PHP Chinese website!