font-variant-position

The font-variant-position CSS property controls the usage of alternate, smaller glyphs that are positioned as superscript or subscript relative to the baseline of the font (which remains unchanged). These glyphs are likely to be used in <sub> and <sup> elements.

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.

Syntax

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

Values

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.

Formal syntax

normal | sub | super

Examples

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

p {
  display: inline;     
}
.normal {
  font-variant-position: normal;
}
.super {
  font-variant-position: super;
}
.sub {
  font-variant-position: sub;
}

Results

Specifications

Browser Compatibility

[1] Experimental implementation was available since Gecko 24. It was governed by the preference layout.css.font-features.enabled defaulting to true on Nightly and Aurora only.