3 位贡献者:


max-height 这个属性会阻止 height 属性的设置值变得比 max-height 更大。

max-height 属性用来设置给定元素的最大高度. 如果height 属性设置的高度比该属性设置的高度还大,则height 属性会失效.

max-height 重载(覆盖掉) height, 但是 min-height 又会重载(覆盖掉) max-height.

  • 初始值 none
  • 适用元素 all elements but non-replaced inline elements, table columns, and column groups
  • 是否是继承属性 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.
  • 适用媒体 visual
  • 计算值 the percentage as specified or the absolute length or none
  • 是否适用于 CSS 动画 yes, as a length, percentage or calc(); when both values are lengths, they are interpolated as lengths; when both values are percentages, they are interpolated as percentages; otherwise, both values are converted into a calc() function that is the sum of a length and a percentage (each possibly zero), and these calc() functions have each half interpolated as real numbers.
  • 正规顺序 the unique non-ambiguous order defined by the formal grammar




/* <length> value */
max-height: 3.5em;

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

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

max-height: inherit;


一个固定的最大高度. 查看<length>了解可用的长度单位.
A fixed maximum height. See <length> for possible units.
The <percentage> is calculated with respect to the height of the containing block. If the height of the containing block is not specified explicitly, the percentage value is treated as none.
No limit on the height of the box.
The intrinsic preferred height.
The intrinsic minimum height.
The containing block height minus vertical margin, border and padding. Some browsers implement an ancient name for this keyword, available.

The same as max-content. 


<length> | <percentage> | none | max-content | min-content | fit-content | fill-available



table { max-height: 75%; }

form { max-height: none; }


查看在线演示 (该演示目前不可用)


Specification Status Comment
CSS Intrinsic & Extrinsic Sizing Module Level 3
Working Draft Adds the max-content,min-contentfit-content, and fill-available keywords.
Both CSS3 Box and CSS3 Writing Modes drafts defined at some point these keywords. These drafts are superseded by this spec.
CSS Transitions
Working Draft Defines max-height as animatable.
CSS Level 2 (Revision 1)
Recommendation Initial definition.



Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.0 (1.7 or earlier) 7.0 7.0 1.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 1.0 1.0 (1) 6.0 6.0 1.0


[1] CSS 2.1 explicitely leaves the behavior of max-height with <table> undefined. Therefore any behavior is CSS2.1-compliant; newer CSS specifications may define this behavior, so Web developers shouldn't rely on a specific one now.

[2] Gecko experimentally implements the definitions given in CSS3 Basic Box. This one defines available and not fill-available. Also the definition of fit-content is simpler than in CSS3 Sizing.

[3] WebKit implements an earlier proposal for setting the height to an intrinsic height: the keywords intrinsic, instead of max-content, and min-intrinsic, instead of min-content. There is no equivalent for fill-available or fit-content.


box model, max-width, box-sizing, height, min-height


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