font-variant-position

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The font-variant-position CSS property controls the use of alternate, smaller glyphs that are positioned as superscript or subscript.

The glyphs are positioned relative to the baseline of the font, which remains unchanged. These glyphs are typically used in <sub> and <sup> elements.

/* Keyword values */
font-variant-position: normal;
font-variant-position: sub;
font-variant-position: super;

/* Global values */
font-variant-position: inherit;
font-variant-position: initial;
font-variant-position: unset;

When the usage of these alternate glyphs is activated, if one character in the run doesn't have such a typographically-enhanced glyph, the whole set of characters of the run is rendered using a fallback method, synthesizing these glyphs.

These alternate glyphs share the same em-box and the same baseline as the rest of the font. They are merely graphically enhanced, and have no effect on the line-height and other box characteristics.

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
适用媒体visual
计算值as specified
Animation typediscrete
正规顺序the unique non-ambiguous order defined by the formal grammar

语法

The font-variant-position property is specified as one of the keyword values listed below.

可选值

normal
Deactivates alternate superscript and subscript glyphs.
sub
Activates subscript alternate glyphs. If, in a given run, one such glyph is not available for a character, all the characters in the run are rendered using synthesized glyphs.
super
Activates superscript alternate glyphs. If, in a given run, one such glyph is not available for a character, all the characters in the run are rendered using synthesized glyphs.

正式语法

normal | sub | super

示例

HTML

<p class="normal">Normal!</p>
<p class="super">Super!</p>
<p class="sub">Sub!</p>

CSS

p {
  display: inline;
}

.normal {
  font-variant-position: normal;
}

.super {
  font-variant-position: super;
}

.sub {
  font-variant-position: sub;
}

Result

规范

规范 状态 说明
CSS Fonts Module Level 3
font-variant-position
Candidate Recommendation Initial definition.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
font-variant-position
Experimental
Chrome No support NoEdge No support NoFirefox Full support 34
Full support 34
No support 24 — 34
Disabled
Disabled From version 24 until version 34 (exclusive): this feature is behind the layout.css.font-features.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 34
Full support 34
No support 24 — 34
Disabled
Disabled From version 24 until version 34 (exclusive): this feature is behind the layout.css.font-features.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.
User must explicitly enable this feature.