max-block-size

A logical property that sets the maximum size of an element in the block axis (usually 'height'). It's the logical replacement for 'max-height'.

It is documented as part of the CSS Logical Properties and Values specification.

/* Usage Example */
.side-panel {
  /* Prevents the panel from growing taller than 80vh logically */
  max-block-size: 80vh;
  overflow: auto;
}

/* Syntax */
max-block-size: max-width;

/* Global values */
max-block-size: inherit;
max-block-size: initial;
max-block-size: revert;
max-block-size: revert-layer;
max-block-size: unset;
Widely available Since 2021 95% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2021.

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