Why Doesn't Vertical Alignment Work on Inline-Block Elements Across Multiple Lines?

Vertical Alignment Not Aligning Inline-Block Elements: Unveiling the Hidden Reason

Vertical alignment is often used to position elements horizontally within their containing block. However, it's important to note that vertical alignment only applies to inline and inline-block elements, as well as images and table elements. Additionally, it must be applied to the child element, not the parent element, unlike text-alignment.

Despite this understanding, some users may encounter situations where setting vertical-align: middle on an inline-block element does not achieve the desired result. This is because vertical alignment aligns inline-level content within its line box, not the containing block.

A line box is the rectangular area containing the boxes generated by inline-level elements. When text wraps onto multiple lines, each line forms its own line box. So, for example, applying vertical-align to a single line of text will only affect its vertical position within that line box, not its overall position within the parent element.

To achieve vertical alignment of inline-block elements across multiple lines, consider using other techniques such as flexbox, CSS Grid, or explicit height values for the parent element.

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