Why Don't Two 50% Width Inline-Block Elements Always Fit Side-by-Side?

Why Inline-Block Elements with 50% Width Don't Fit Side by Side

When two inline-block elements are specified with 50% width, they often fail to align side by side. This issue arises from the inherent whitespace between inline-block elements, which occupies approximately 4px.

Whitespace Issue

Including this whitespace, the combined width of both divs exceeds 100%, causing them to break apart. For instance, if we use two inline-block divs with a width of 50% each, the total width becomes 150% of the container, resulting in the following:

<div>50% + 4px whitespace + 50%</div>

Solutions

While reducing the width of one div to 49% may resolve the issue, it introduces a small gap between the divs. Alternatively, floating the divs works effectively.

However, for modern web development, it's highly recommended to utilize flexbox or CSS grid layout instead of inline-block as they provide superior control over element positioning and resolving whitespace issues.

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