files/zh-cn/mozilla/tech/xul/attribute/checked/index.html


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---
title: checked
slug: Mozilla/Tech/XUL/Attribute/checked
tags:
  - XUL Attributes
translation_of: Archive/Mozilla/XUL/Attribute/checked
---
<div class="noinclude">
 <span class="breadcrumbs xulRefAttr_breadcrumbs">« <a href="/zh-CN/docs/XUL_Reference">XUL Reference home</a></span></div>
<dl>
 <dt>
  <code id="a-checked"><a href="https://developer.mozilla.org/zh-CN/docs/Mozilla/Tech/XUL/Attribute/checked">checked</a></code></dt>
 <dd>
  Type:
  <i>
   boolean</i>
 </dd>
 <dd>
  Indicates whether the element is checked or not.</dd>
 <dd>
  Use <code>hasAttribute()</code> to determine whether this attribute is set instead of <code>getAttribute()</code>.</dd>
 <dd>
  For buttons, the <code>type</code> attribute must be set to <code>checkbox</code> or <code>radio</code> for this attribute to have any effect.&lt;magic name="\"PAGENAME\"/"&gt;&lt;/magic&gt;</dd>
</dl>