max-height

The max-height CSS descriptor specifies the maximum height of the viewport of a document defined via the @viewport at-rule.

The height will initially be set as close as possible to the initial viewport height considering the maximum height constraint.

Syntax

/* Keyword value */
max-height: auto;

/* <length> values */
max-height: 400px;
max-height: 50em;
max-height: 20cm;

/* <percentage> value */
max-height: 75%;

Values

auto

The used value is calculated from the other CSS descriptors' values.

<length>

A non-negative absolute or relative length.

<percentage>

A percentage value relative to the height of the initial viewport at zoom factor 1.0 for vertical lengths. Must be non-negative.

Formal definition

Formal syntax

<viewport-length>
where 
<viewport-length> = auto | <length-percentage>
where 
<length-percentage> = <length> | <percentage>

Examples

Setting viewport max height in pixels

@viewport {
  max-height: 600px;
}

Specifications

Browser compatibility

See also

• @viewport