CSS sizing level 3 introduced the concept of intrinsic dimensions, which are determined based on the box's contents rather than its parent box. This contrasts with extrinsic dimensions, which are determined by the box's parent box.
min-content defines the minimal width or height of a box that prevents content from overflowing. In practical terms, it corresponds to the minimum size of the box that can accommodate all of its contents without truncation or scrolling.
A simple way to visualize min-content is through the behavior of float. When a box is floated and the parent container has a specific width, the floated box will shrink to the point where the content fits within its boundaries. This minimum width is effectively the min-content value.
On the other hand, max-content represents the ideal size of a box when it has unlimited available space. This means that max-content allows the box to expand to its natural size without causing content overflow or whitespace gaps.
To demonstrate max-content, consider a floated box that is placed in a container with a width set to an extremely large value, such as 99999999999999999px. As the container's width increases, the floated box will expand to fill the available space, reaching its maximum width without any empty space or overflow. This maximum width represents the max-content value.
The definitions of min-content and max-content have evolved over time, but their underlying principles remain consistent. These properties allow more flexible control over box dimensions, ensuring that content is displayed effectively while maximizing space utilization within the layout.
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