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---
title: <optgroup>
slug: Web/HTML/Element/optgroup
tags:
- Element
- Forms
- HTML
- Reference
- Web
translation_of: Web/HTML/Element/optgroup
---
<h2 id="總覽">總覽</h2>
<p>In a Web form, the <strong>HTML <code><optgroup></code> element</strong> creates a grouping of options within a {{HTMLElement("select")}} element.</p>
<table class="properties">
<tbody>
<tr>
<th scope="row"><a href="/en-US/docs/HTML/Content_categories" title="HTML/Content_categories">Content categories</a></th>
<td>None.</td>
</tr>
<tr>
<th scope="row">Permitted content</th>
<td>Zero or more {{HTMLElement("option")}} elements.</td>
</tr>
<tr>
<th scope="row">Tag omission</th>
<td>The <span title="syntax-start-tag">start tag</span> is mandatory. The <span title="syntax-end-tag">end tag</span> is optional if this element is immediately followed by another <span style="font-family: courier new;"><optgroup></span> element, or if the parent element has no more content.</td>
</tr>
<tr>
<th scope="row">Permitted parent elements</th>
<td>A {{HTMLElement("select")}} element.</td>
</tr>
<tr>
<th scope="row">DOM interface</th>
<td>{{domxref("HTMLOptGroupElement")}}</td>
</tr>
</tbody>
</table>
<p>{{Note("Optgroup elements may not be nested.")}}</p>
<h2 id="屬性">屬性</h2>
<p><span style="line-height: 21px;">This element includes the </span><a href="https://developer.mozilla.org/en-US/docs/HTML/Global_attributes" style="line-height: 21px;" title="HTML/Global attributes">global attributes</a><span style="line-height: 21px;">.</span></p>
<dl>
<dt>{{htmlattrdef("disabled")}}</dt>
<dd>If this Boolean attribute is set, none of the items in this option group is selectable. Often browsers grey out such control and it won't receive any browsing events, like mouse clicks or focus-related ones.</dd>
<dt>{{htmlattrdef("label")}}</dt>
<dd>The name of the group of options, which the browser can use when labeling the options in the user interface. This attribute is mandatory if this element is used.</dd>
</dl>
<h2 id="範例">範例</h2>
<pre class="brush: html"><select>
<optgroup label="Group 1">
<option>Option 1.1</option>
</optgroup>
<optgroup label="Group 2">
<option>Option 2.1</option>
<option>Option 2.2</option>
</optgroup>
<optgroup label="Group 3" disabled>
<option>Option 3.1</option>
<option>Option 3.2</option>
<option>Option 3.3</option>
</optgroup>
</select>
</pre>
<h3 id="結果">結果</h3>
<p>{{EmbedLiveSample("Example")}}</p>
<h2 id="規範">規範</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('HTML WHATWG', 'the-button-element.html#the-optgroup-element', '<optgroup>')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('HTML5 W3C', 'forms.html#the-optgroup-element', '<optgroup>')}}</td>
<td>{{Spec2('HTML5 W3C')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('HTML4.01', 'interact/forms.html#h-17.6', '<optgroup>')}}</td>
<td>{{Spec2('HTML4.01')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility" name="Browser_compatibility">瀏覽器相容性</h2>
<p>{{CompatibilityTable}}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>功能</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>基本</td>
<td>1.0</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>功能</th>
<th>Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>基本</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="參見">參見</h2>
<ul>
<li>Other form-related elements: {{HTMLElement("form")}}, {{HTMLElement("legend")}}, {{HTMLElement("label")}}, {{HTMLElement("button")}}, {{HTMLElement("select")}}, {{HTMLElement("datalist")}}, {{HTMLElement("option")}}, {{HTMLElement("fieldset")}}, {{HTMLElement("textarea")}}, {{HTMLElement("keygen")}}, {{HTMLElement("input")}}, {{HTMLElement("output")}}, {{HTMLElement("progress")}} and {{HTMLElement("meter")}}.</li>
</ul>
<p>{{HTMLRef}}</p>
|
