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---
title: font-kerning
slug: Web/CSS/font-kerning
translation_of: Web/CSS/font-kerning
---
<div>{{CSSRef}}</div>
<p><strong><code>font-kerning</code></strong> CSS 属性设置是否使用字体中储存的字距信息。</p>
<pre class="brush:css no-line-numbers">/* Keyword values */
font-kerning: auto;
font-kerning: normal;
font-kerning: none;
/* Global values */
font-kerning: inherit;
font-kerning: initial;
font-kerning: unset;
</pre>
<p><em>Kerning</em>（字距）定义了字母的分布情况。对于良好地规定了字距的字体，字距特性使得字母分布更为统一，阅读体验更佳。如下图所示，左侧的示例没有应用字距，而右侧使用了：</p>
<p><img alt="Example of font-kerning" src="https://mdn.mozillademos.org/files/8455/font-kerning.png" style="display: block; height: 84px; margin: auto; width: 180px;"></p>
<p>{{cssinfo}}</p>
<h2 id="语法">语法</h2>
<p><code>font-kerning</code> 属性通过以下的关键字进行指定。</p>
<h3 id="值">值</h3>
<dl>
<dt><code>auto</code></dt>
<dd>浏览器来决定是否使用字体字距。比如，一些浏览器会在小字体的情况下禁用字距，因为这会使得文本可读性下降。</dd>
<dt><code>normal</code></dt>
<dd>必须应用字体中的字距信息。</dd>
<dt><code>none</code></dt>
<dd>禁用字体中的字距信息。</dd>
</dl>
<h3 id="Formal_syntax">Formal syntax</h3>
{{csssyntax}}
<h2 id="示例">示例</h2>
<h3 id="HTML">HTML</h3>
<pre class="brush: html"><div id="kern"></div>
<div id="nokern"></div>
<textarea id="input">AV T. ij</textarea></pre>
<h3 id="CSS">CSS</h3>
<pre class="brush: css">div {
font-size: 2rem;
font-family: serif;
}
#nokern {
font-kerning: none;
}
#kern {
font-kerning: normal;
}</pre>
<h3 id="JavaScript">JavaScript</h3>
<pre class="brush: js">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;
</pre>
<p>{{ EmbedLiveSample('Example') }}</p>
<h2 id="规格">规格</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">规格</th>
<th scope="col">状态</th>
<th scope="col">注释</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('CSS3 Fonts', '#propdef-font-kerning', 'font-kerning')}}</td>
<td>{{Spec2('CSS3 Fonts')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="Browser_Compatibility" name="Browser_Compatibility">浏览器兼容性</h2>
<p>{{Compat("css.properties.font-kerning")}}</p>
<h2 id="参考">参考</h2>
<ul>
<li>{{cssxref("font-variant")}}, {{cssxref("font-variant-position")}}, {{cssxref("font-variant-east-asian")}}, {{cssxref("font-variant-caps")}}, {{cssxref("font-variant-ligatures")}}, {{cssxref("font-variant-numeric")}}, {{cssxref("font-variant-alternates")}}, {{cssxref("font-synthesis")}}, {{cssxref("letter-spacing")}}</li>
</ul>
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