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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/css/height/index.html | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/css/height/index.html b/files/zh-cn/web/css/height/index.html new file mode 100644 index 0000000000..1666465e3f --- /dev/null +++ b/files/zh-cn/web/css/height/index.html @@ -0,0 +1,167 @@ +--- +title: height +slug: Web/CSS/height +tags: + - CSS + - CSS Property + - Reference +translation_of: Web/CSS/height +--- +<div>{{CSSRef()}}</div> + +<div><code>height</code> CSS 属性指定了一个元素的高度。默认情况下,这个属性决定的是内容区( <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Box_Model/Introduction_to_the_CSS_box_model#content-area">content area</a>)的高度,但是,如果将 {{cssxref("box-sizing")}} 设置为 <code>border-box</code> , 这个属性决定的将是边框区域(<a href="https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Box_Model/Introduction_to_the_CSS_box_model#border-area">border area</a>)的高度。</div> + +<div>{{EmbedInteractiveExample("pages/css/height.html")}}</div> + +<div>{{cssxref("min-height")}} 和 {{cssxref("max-height")}} 属性会覆盖 {{Cssxref("height")}}。</div> + +<h2 id="Syntax" name="Syntax">语法</h2> + +<pre class="brush:css no-line-numbers">/* 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>{{cssxref("<length>")}}</dt> + <dd>将高度定义为一个绝对值。</dd> + <dt>{{cssxref("<percentage>")}}</dt> + <dd>将高度定义为相对包含块高度的百分比。</dd> + <dt><code>border-box</code> {{experimental_inline}}</dt> + <dd>如果设置该值,则 {{cssxref("<length>")}} 或者 {{cssxref("<percentage>")}} 会设置为该元素的 border box。</dd> + <dt><code>content-box</code> {{experimental_inline}}</dt> + <dd>如果设置该值,则 {{cssxref("<length>")}} 或者 {{cssxref("<percentage>")}} 会设置为该元素的 content box。</dd> +</dl> + +<dl> + <dt><code>auto</code></dt> + <dd>由浏览器为元素计算并选择一个高度。</dd> + <dt><code>fill</code> {{experimental_inline}}</dt> + <dd>根据文字方向,使用 <code>fill-available</code> 作为行大小或者块大小。</dd> + <dt><code>max-content</code> {{experimental_inline}}</dt> + <dd>设置为允许的最大高度。</dd> + <dt><code>min-content</code> {{experimental_inline}}</dt> + <dd>设置为允许的最小高度.</dd> + <dt><code>available</code> {{experimental_inline}}</dt> + <dd>包含块高度减去当前元素的边距,边框和填充。</dd> + <dt><code>fit-content</code> {{experimental_inline}}</dt> + <dd>将 fill-content 公式中的可用位置替换为特定的参数以进行使用,如:min(max-content, max(min-content, ))</dd> +</dl> + +<h3 id="Formal_syntax">Formal syntax</h3> + +<pre class="syntaxbox">{{csssyntax}}</pre> + +<h2 id="示例">示例</h2> + +<h3 id="HTML">HTML</h3> + +<pre class="brush: html"><div id="taller">I'm 50 pixels tall.</div> +<div id="shorter">I'm 25 pixels tall.</div> +<div id="parent"> + <div id="child"> + I'm half the height of my parent. + </div> +</div></pre> + +<h3 id="CSS">CSS</h3> + +<pre class="brush: css">div { + width: 250px; + margin-bottom: 5px; + border: 2px solid blue; +} + +#taller { + height: 50px; +} + +#shorter { + height: 25px; +} + +#parent { + height: 100px; +} + +#child { + height: 50%; + width: 75%; +} +</pre> + +<h3 id="结果">结果</h3> + +<p>{{EmbedLiveSample('示例', 'auto', 240)}}</p> + +<h2 id="无障碍问题">无障碍问题</h2> + +<p>确保设定了 <code>height</code> 的元素在显示上不会被截断,或者当页面放大时增大的字体大小不会遮挡其他内容。 </p> + +<ul> + <li><a href="https://developer.mozilla.org/en-US/docs/Web/Accessibility/Understanding_WCAG/Perceivable#Guideline_1.4_Make_it_easier_for_users_to_see_and_hear_content_including_separating_foreground_from_background">MDN Understanding WCAG, Guideline 1.4 explanations</a></li> + <li><a href="https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-scale.html">Understanding Success Criterion 1.4.4 | W3C Understanding WCAG 2.0</a></li> +</ul> + +<h2 id="规范">规范</h2> + +<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> + +<p>{{cssinfo}}</p> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p>{{Compat("css.properties.height")}}</p> + +<h2 id="See_also" name="See_also">参见</h2> + +<ul> + <li><a href="https://developer.mozilla.org/en-US/docs/CSS/box_model">box model</a>, {{cssxref("width")}}, {{cssxref("box-sizing")}}, {{cssxref("min-height")}}, {{cssxref("max-height")}}</li> +</ul> |