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The font-kerning CSS property controls the usage of the kerning information stored in a font.

/* Keyword values */
font-kerning: auto;
font-kerning: normal;
font-kerning: none;

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

Kerning defines how letters are spaced. In well-kerned fonts, this feature makes character spacing more uniform and pleasant to read than it would otherwise be. In the image below, for instance, the examples on the left do not use kerning, while the ones on the right do:

Example of font-kerning

Initial valueauto
Applies toall elements. It also applies to ::first-letter and ::first-line.
Inheritedyes
Mediavisual
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

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

Values

auto
The browser determines whether font kerning should be used or not. For example, some browsers will disable kerning on small fonts, since applying it could harm the readability of text.
normal
Font kerning information stored in the font must be applied.
none
Font kerning information stored in the font is disabled.

Formal syntax

auto | normal | none

Example

HTML

<div id="kern"></div>
<div id="nokern"></div>
<textarea id="input">AV T. ij</textarea>

CSS

div {
  font-size: 2rem;
  font-family: serif;
}

#nokern {
  font-kerning: none;
}

#kern {
  font-kerning: normal;
}

JavaScript

var input  = document.getElementById('input'),
    kern   = document.getElementById('kern'),
    nokern = document.getElementById('nokern');

input.addEventListener('keyup', function() {
  kern.textContent = input.value; /* Update content */
  nokern.textContent = input.value;
});

kern.textContent = input.value; /* Initialize content */
nokern.textContent = input.value;

Specifications

Specification Status Comment
CSS Fonts Module Level 3
The definition of 'font-kerning' in that specification.
Candidate Recommendation Initial definition.

Browser Compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 32[1] (Yes) 34 (34)[2] 10[3] ? 7
Feature Android Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? (Yes) 34.0 (34)[2] ? ? 7

[1] Requires prefix -webkit-font-kerning. First version supporting this property is not known.

[2] 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.

[3] OpenType layout features might be supported using font-feature-settings property, however individual font-kerning property is not supported.

See also

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 Zuletzt aktualisiert von: mfluehr,