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---
title: height
slug: Web/CSS/height
translation_of: Web/CSS/height
---
<div>{{CSSRef}}</div>
<h2 id="概要">概要</h2>
<p><strong><code>高度(height)</code></strong> 的 CSS 屬性指定了元素內容區域的高度。<a href="/en-US/docs/CSS/box_model#content">content area</a> 在元素的留白(padding)、邊框(border) 與 邊界(margin) 內。</p>
<p>{{cssxref("min-height")}} 與 {{cssxref("max-height")}} 的特性比 {{Cssxref("height")}} 更重要。</p>
<p>{{cssinfo}}</p>
<h2 id="語法">語法</h2>
<pre class="brush:css">/* Keyword value */
height: auto;
/* <length> values */
height: 120px;
height: 10em;
/* <percentage> value */
height: 75%;
/* Global values */
height: inherit;
height: initial;
height: unset;
</pre>
<h3 id="值">值</h3>
<dl>
<dt><code><length></code></dt>
<dd>查看 {{cssxref("<length>")}} 可用的單位。</dd>
<dt><code><percentage></code></dt>
<dd>{{cssxref("<percentage>")}} 相對於元素的塊狀高度。如果沒有指定塊狀元素的高度，預設值為 <code>auto。</code>用在 root 元素 (e.g. <code><html></code>) 上是相對於初始塊狀元素（即顯示器的尺寸）。</dd>
<dt><code>border-box </code>{{experimental_inline}}</dt>
<dd>If present, the preceding {{cssxref("<length>")}} or {{cssxref("<percentage>")}} is applied to the element's border box.</dd>
<dt><code>content-box</code> {{experimental_inline}}</dt>
<dd>{{cssxref("<length>")}} 或 {{cssxref("<percentage>")}} 是應用於元素的 content box.</dd>
<dt><code>auto</code></dt>
<dd>瀏覽器將計算並選擇指定元素的高度。</dd>
<dt>fill {{experimental_inline}}</dt>
<dd>Use the <code>fill-available</code> inline size or <code>fill-available</code> block size, as appropriate to the writing mode.</dd>
<dt><code>max-content</code> {{experimental_inline}}</dt>
<dd>The intrinsic preferred height.</dd>
<dt><code>min-content</code> {{experimental_inline}}</dt>
<dd>The intrinsic minimum height.</dd>
<dt><code>available</code> {{experimental_inline}}</dt>
<dd>The containing block height minus vertical margin, border and padding.</dd>
<dt><code>fit-content</code> {{experimental_inline}}</dt>
<dd>The larger of:
<ul>
<li>the intrinsic minimum height</li>
<li>the smaller of the intrinsic preferred height and the available height</li>
</ul>
</dd>
</dl>
<h3 id="正式語法">正式語法</h3>
{{csssyntax}}
<h2 id="範例">範例</h2>
<h3 id="HTML">HTML</h3>
<pre class="brush: html"><div id="red">
<span>I'm 50 pixels tall.</span>
</div>
<div id="green">
<span>I'm 25 pixels tall.</span>
</div>
<div id="parent">
<div id="child">
<span>I'm half the height of my parent.</span>
</div>
</div>
</pre>
<h3 id="CSS">CSS</h3>
<pre class="brush: css">div {
width: 250px;
margin-bottom: 5px;
border: 3px solid #999999;
}
#red {
height: 50px;
}
#green {
height: 25px;
}
#parent {
height: 100px;
}
#child {
height: 50%;
width: 75%;
}
</pre>
<p>{{EmbedLiveSample('Example')}}</p>
<h2 id="規格">規格</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('CSS3 Box', '#the-width-and-height-properties', 'height')}}</td>
<td>{{Spec2('CSS3 Box')}}</td>
<td>Added the <code>max-content</code>, <code>min-content</code>, <code>available</code>, <code>fit-content</code>, <code>border-box</code>, <code>content-box</code> keywords.</td>
</tr>
<tr>
<td>{{SpecName('CSS3 Transitions', '#animatable-css', 'height')}}</td>
<td>{{Spec2('CSS3 Transitions')}}</td>
<td>Lists <code>height</code> as animatable.</td>
</tr>
<tr>
<td>{{SpecName('CSS2.1', 'visudet.html#the-height-property', 'height')}}</td>
<td>{{Spec2('CSS2.1')}}</td>
<td>Adds support for the {{cssxref("<length>")}} values and precises on which element it applies to.</td>
</tr>
<tr>
<td>{{SpecName('CSS1', '#height', 'height')}}</td>
<td>{{Spec2('CSS1')}}</td>
<td>Initial definition</td>
</tr>
<tr>
<td>{{SpecName('CSS3 Sizing', '#width-height-keywords', 'width')}}</td>
<td>{{Spec2('CSS3 Sizing')}}</td>
<td>Adds new sizing keywords for width and height.</td>
</tr>
</tbody>
</table>
<h2 id="瀏覽器兼容性">瀏覽器兼容性</h2>
{{Compat("css.properties.height")}}
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/CSS/box_model">box model</a>, {{cssxref("width")}}, {{cssxref("box-sizing")}}, {{cssxref("min-height")}}, {{cssxref("max-height")}}</li>
</ul>
|
