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max-block-size

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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

Summary

The max-block-size CSS property defines the horizontal or vertical maximal size of an element's block depending on its writing mode. It corresponds to the max-width or the max-height property, depending on the value defined for writing-mode. If the writing mode is vertically oriented, the value of max-block-size relates to the maximal width of the element, otherwise it relates to the maximal height of the element. It relates to max-inline-size, which defines the other dimension of the element.

Initial value0
Applies tosame as width and height
Inheritedno
Percentagesblock-size of containing block
Mediavisual
Computed valuesame as max-width and max-height
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

/* <length> values */
max-block-size: 300px;
max-block-size: 25em;

/* <percentage> values */
max-block-size: 75%;

/* Keyword values */
max-block-size: none;
max-block-size: max-content;
max-block-size: min-content;
max-block-size: fit-content;
max-block-size: fill-available;

/* Global values */
max-block-size: inherit;
max-block-size: initial;
max-block-size: unset;

Values

The max-block-size property takes the same values as the max-width and max-height properties.

Formal syntax

<'max-width'>

Example

HTML Content

<p class="exampleText">Example text</p>

CSS Content

.exampleText {
  writing-mode: vertical-rl;
  background-color: yellow;
  block-size: 100%;
  max-block-size: 200px;
}

Specification

Specification Status Comment
CSS Logical Properties Level 1
The definition of 'max-block-size' in that specification.
Editor's Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support 41.0 (41.0)[1] No support No support No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support 41.0 (41.0)[1] No support No support No support

[1] Available since Gecko 38, but behind the preference layout.css.vertical-text.enabled, then disabled by default. The preference has been removed in Gecko 51 and this property cannot be disabled since this version.

See also

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