max-height
The max-height
CSS property sets the maximum height of an element. It prevents the used value of the height
property from becoming larger than the value specified for max-height
.
Try it
max-height
overrides height
, but min-height
overrides max-height
.
Syntax
/* <length> value */
max-height: 3.5em;
max-height: anchor-size(height);
max-height: calc(anchor-size(--myAnchor self-block, 250px) + 2em);
/* <percentage> value */
max-height: 75%;
/* Keyword values */
max-height: none;
max-height: max-content;
max-height: min-content;
max-height: fit-content;
max-height: fit-content(20em);
max-height: stretch;
/* Global values */
max-height: inherit;
max-height: initial;
max-height: revert;
max-height: revert-layer;
max-height: unset;
Values
<length>
-
Defines the
max-height
as an absolute value. <percentage>
-
Defines the
max-height
as a percentage of the containing block's height. none
-
No limit on the size of the box.
max-content
-
The intrinsic preferred
max-height
. min-content
-
The intrinsic minimum
max-height
. fit-content
-
Use the available space, but not more than max-content, i.e.
min(max-content, max(min-content, stretch))
. fit-content(
<length-percentage>
)-
Uses the
fit-content
formula with the available space replaced by the specified argument, i.e.min(max-content, max(min-content, argument))
. stretch
-
Limits the maximum height of the element's margin box to the height of its containing block. It attempts to make the margin box fill the available space in the containing block, so in a way behaving similar to
100%
but applying the resulting size to the margin box rather than the box determined by box-sizing.Note: To check aliases used by browsers for the
stretch
value and its implementation status, see the Browser compatibility section.
Accessibility
Ensure that elements set with a max-height
are not truncated and/or do not obscure other content when the page is zoomed to increase text size.
Formal definition
Initial value | none |
---|---|
Applies to | all elements but non-replaced inline elements, table columns, and column groups |
Inherited | no |
Percentages | The percentage is calculated with respect to the height of the generated box's containing block. If the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the percentage value is treated as none . |
Computed value | the percentage as specified or the absolute length or none |
Animation type | a length, percentage or calc(); |
Formal syntax
max-height =
none |
<length-percentage [0,∞]> |
min-content |
max-content |
fit-content( <length-percentage [0,∞]> ) |
<calc-size()> |
<anchor-size()>
<length-percentage> =
<length> |
<percentage>
<calc-size()> =
calc-size( <calc-size-basis> , <calc-sum> )
<anchor-size()> =
anchor-size( [ <anchor-element> || <anchor-size> ]? , <length-percentage>? )
<calc-size-basis> =
<intrinsic-size-keyword> |
<calc-size()> |
any |
<calc-sum>
<calc-sum> =
<calc-product> [ [ '+' | '-' ] <calc-product> ]*
<anchor-element> =
<dashed-ident>
<anchor-size> =
width |
height |
block |
inline |
self-block |
self-inline
<calc-product> =
<calc-value> [ [ '*' | '/' ] <calc-value> ]*
<calc-value> =
<number> |
<dimension> |
<percentage> |
<calc-keyword> |
( <calc-sum> )
<calc-keyword> =
e |
pi |
infinity |
-infinity |
NaN
Examples
Setting max-height using percentage and keyword values
table {
max-height: 75%;
}
form {
max-height: none;
}
Specifications
Specification |
---|
CSS Box Sizing Module Level 4 # width-height-keywords |
CSS Box Sizing Module Level 4 # sizing-values |
Browser compatibility
BCD tables only load in the browser
See also
- The box model,
box-sizing
height
,min-height
- The mapped logical properties:
max-inline-size
,max-block-size