font-stretch

font-stretch 属性为字体定义一个正常或经过伸缩变形的字体外观，这个属性并不会通过伸展/缩小而改变字体的几何外形，如font-feature-settings和font-variant属性，它仅仅意味着当有多种字体可供选择时，会为字体选择最适合的大小。

The two 'e' belong to the same fonts. One is condensed, the other normal and can be selected by 'font-stretch'.

初始值normal
适用元素all elements. It also applies to ::first-letter and ::first-line.
是否是继承属性yes
计算值as specified
Animation typea font stretch

Syntax

/* Keyword values */
font-stretch: ultra-condensed;
font-stretch: extra-condensed;
font-stretch: condensed;
font-stretch: semi-condensed;
font-stretch: normal;
font-stretch: semi-expanded;
font-stretch: expanded;
font-stretch: extra-expanded;
font-stretch: ultra-expanded;

/* Global values */
font-stretch: inherit;
font-stretch: initial;
font-stretch: unset;

Values

normal

指定默认字体

semi-condensed, condensed, extra-condensed, ultra-condensed

小于默认字体，其中 ultra-condensed 是缩的最小的字体

semi-expanded, expanded, extra-expanded, ultra-expanded

大于默认字体的值

Interpolation

Font stretch values are interpolated in discrete steps. The interpolation happens as though the ordered values are equally spaced real numbers; the result is rounded to the nearest value, with values exactly halfway between two values rounded towards the later value, that is the most expanded one.

Formal syntax

font-stretch = 
  normal              |
  <percentage [0,∞]>  |
  ultra-condensed     |
  extra-condensed     |
  condensed           |
  semi-condensed      |
  semi-expanded       |
  expanded            |
  extra-expanded      |
  ultra-expanded

示例

HTML

<div class="ultra stretch"> This is text with the font extremely expanded</div>
<div class="stretch"> This is text with the font stretched</div>
<div class="normal"> This is text without font stretching</div>
<div class="condensed"> This is text with the font condensed</div>
<div class="ultra condensed"> This is text with the font extremely condensed</div>

CSS

.ultra.stretch{font-stretch: ultra-expanded;}
.stretch {font-stretch: expanded;}
.normal {font-stretch: normal;}
.condensed {font-stretch: condensed;}
.ultra.condensed {font-stretch: ultra-condensed;}

Result

Specifications

Specification
CSS Fonts Module Level 4
# font-stretch-prop

The CSS property font-stretch was initially defined in CSS 2, but dropped in CSS 2.1 due to lack of implementation experience. It has been newly defined in CSS 3.

Browser compatibility

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