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class="sidebar-actions"><section class="sidebar-filter-container"><div class="sidebar-filter "><label id="sidebar-filter-label" class="sidebar-filter-label" for="sidebar-filter-input"><span class="icon icon-filter"></span><span class="visually-hidden">Filter sidebar</span></label><input id="sidebar-filter-input" autoComplete="off" class="sidebar-filter-input-field false" type="text" placeholder="Filter" value=""/><button type="button" class="button action has-icon clear-sidebar-filter-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear filter input</span></span></button></div></section></header><div class="sidebar-inner-nav"><div class="in-nav-toc"><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">在本文中</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#尝试一下">尝试一下</a></li><li class="document-toc-item "><a class="document-toc-link" href="#规范">规范</a></li><li class="document-toc-item "><a class="document-toc-link" href="#浏览器兼容性">浏览器兼容性</a></li><li class="document-toc-item "><a class="document-toc-link" href="#参见">参见</a></li></ul></section></div></div><div class="sidebar-body"> <ol> <li class="section"><a href="/zh-CN/docs/Web/HTML">HTML</a></li> <li class="section"><a href="/zh-CN/docs/Learn/HTML">教程</a></li> <li><a href="/zh-CN/docs/Learn/Getting_started_with_the_web/HTML_basics">HTML 基础</a></li> <li class="toggle"> <details> <summary>HTML 介绍</summary> <ol> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML">HTML 概述</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Getting_started">开始学习 HTML</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/The_head_metadata_in_HTML">head 标签里面有什么？HTML 中的元数据</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/HTML_text_fundamentals">HTML 文本基础</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Creating_hyperlinks">建立超链接</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Advanced_text_formatting">高级文本格式</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Document_and_website_structure">文档和网站架构</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Debugging_HTML">HTML 调试</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Marking_up_a_letter">测验：标记信件</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Structuring_a_page_of_content">测验：构建网页内容</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary>多媒体与嵌入</summary> <ol> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding">多媒体与嵌入概述</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Images_in_HTML">HTML 中的图片</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Video_and_audio_content">视频和音频内容</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Other_embedding_technologies">从 object 到 iframe——其他嵌入技术</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Adding_vector_graphics_to_the_Web">为 web 新增矢量图</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Responsive_images">响应式图片</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Mozilla_splash_page">测验：Mozilla 醒目页面</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary>HTML 表格</summary> <ol> <li><a href="/zh-CN/docs/Learn/HTML/Tables">HTML 表格概述</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Tables/Basics">HTML 表格基础</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Tables/Advanced">HTML 高级表格特性和无障碍</a></li> <li><a href="/zh-CN/docs/Learn/HTML/Tables/Structuring_planet_data">测验：构建行星数据</a></li> </ol> </details> </li> <li class="section"><a href="/zh-CN/docs/Web/HTML/Reference">参考：</a></li> <li class="toggle"> <details> <summary>HTML 元素</summary> <ol><li><a href="/zh-CN/docs/Web/HTML/Element/a"><code><a></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/abbr"><code><abbr></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/acronym"><code><acronym></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/address"><code><address></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/area"><code><area></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/article"><code><article></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/aside"><code><aside></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/audio"><code><audio></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/b"><code><b></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/base"><code><base></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/bdi"><code><bdi></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/bdo"><code><bdo></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/big"><code><big></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/blockquote"><code><blockquote></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/body"><code><body></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/br"><code><br></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/button"><code><button></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/canvas"><code><canvas></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/caption"><code><caption></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/center"><code><center></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/cite"><code><cite></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/code"><code><code></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/col"><code><col></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/colgroup"><code><colgroup></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/data"><code><data></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/datalist"><code><datalist></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dd"><code><dd></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/del"><code><del></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/details"><code><details></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dfn"><code><dfn></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dialog"><code><dialog></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dir"><code><dir></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/div"><code><div></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dl"><code><dl></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/dt"><code><dt></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/em"><code><em></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/embed"><code><embed></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/fencedframe"><code><fencedframe></code></a><abbr class="icon icon-experimental" title="实验性。预期行为可能会在未来发生变更。"> <span class="visually-hidden">实验性</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/fieldset"><code><fieldset></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/figcaption"><code><figcaption></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/figure"><code><figure></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/font"><code><font></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/footer"><code><footer></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/form"><code>form</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/frame"><code><frame></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/frameset"><code><frameset></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/Heading_Elements"><code><h1></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/head"><code><head></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/header"><code><header></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/hgroup"><code><hgroup></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/hr"><code><hr></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/html"><code><html></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/i"><code><i></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/iframe"><code><iframe></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/img"><code><img></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input"><code><input></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/ins"><code><ins></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/kbd"><code><kbd></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/label"><code><label></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/legend"><code><legend></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/li"><code><li></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/link"><code><link></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/main"><code><main></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/map"><code><map></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/mark"><code><mark></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/marquee"><code><marquee></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/menu"><code><menu></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/meta"><code><meta></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/meter"><code><meter></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/nav"><code><nav></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/nobr"><code><nobr></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/noembed"><code><noembed></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/noframes"><code><noframes></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/noscript"><code><noscript></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/object"><code><object></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/ol"><code><ol></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/optgroup"><code><optgroup></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/option"><code><option></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/output"><code><output></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/p"><code><p></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/param"><code><param></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/picture"><code><picture></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/plaintext"><code><plaintext></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/portal"><code><portal></code></a><abbr class="icon icon-experimental" title="实验性。预期行为可能会在未来发生变更。"> <span class="visually-hidden">实验性</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/pre"><code><pre></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/progress"><code><progress></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/q"><code><q></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/rb"><code><rb></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/rp"><code><rp></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/rt"><code><rt></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/rtc"><code><rtc></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/ruby"><code><ruby></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/s"><code><s></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/samp"><code><samp></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/script"><code><script></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/search"><code><search></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/section"><code><section></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/select"><code><select></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/slot"><code><slot></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/small"><code><small></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/source"><code><source></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/span"><code><span></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/strike"><code><strike></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/strong"><code><strong></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/style"><code><style></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/sub"><code><sub></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/summary"><code><summary></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/sup"><code><sup></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/table"><code><table></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/tbody"><code><tbody></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/td"><code><td></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/template"><code><template></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/textarea"><code><textarea></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/tfoot"><code><tfoot></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/th"><code><th></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/thead"><code><thead></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/time"><code><time></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/title"><code><title></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/tr"><code><tr></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/track"><code><track></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/tt"><code><tt></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Element/u"><code><u></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/ul"><code><ul></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/var"><code><var></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/video"><code><video></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/wbr"><code><wbr></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/xmp"><code><xmp></code></a><abbr class="icon icon-deprecated" title="已弃用。请不要在新的网站中使用。"> <span class="visually-hidden">已弃用</span> </abbr></li></ol> </details> </li> <li class="toggle"> <details open=""> <summary>全局属性</summary> <ol><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/accesskey"><code>accesskey</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/anchor"><code>anchor</code></a><abbr class="icon icon-experimental" title="实验性。预期行为可能会在未来发生变更。"> <span class="visually-hidden">实验性</span> </abbr><abbr class="icon icon-nonstandard" title="非标准。请在使用前检查跨浏览器支持。"> <span class="visually-hidden">非标准</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/autocapitalize"><code>autocapitalize</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/autocorrect"><code>autocorrect</code></a><abbr class="icon icon-experimental" title="实验性。预期行为可能会在未来发生变更。"> <span class="visually-hidden">实验性</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/autofocus"><code>autofocus</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/class"><code>class</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/contenteditable"><code>contenteditable</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/data-*"><code>data-*</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/dir"><code>dir</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/draggable"><code>draggable</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/enterkeyhint"><code>enterkeyhint</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/exportparts"><code>exportparts</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/hidden"><code>hidden</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/id"><code>id</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/inert"><code>inert</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/inputmode"><code>inputmode</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/is"><code>is</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/itemid"><code>itemid</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/itemprop"><code>itemprop</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/itemref"><code>itemref</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/itemscope"><code>itemscope</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/itemtype"><code>itemtype</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/lang"><code>lang</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/nonce"><code>nonce</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/part"><code>part</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/popover"><code>popover</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/slot"><code>slot</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/spellcheck"><code>spellcheck</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/style"><code>style</code></a></li><li><em><a href="/zh-CN/docs/Web/HTML/Global_attributes/tabindex" aria-current="page"><code>tabindex</code></a></em></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/title"><code>title</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/translate"><code>translate</code></a></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/virtualkeyboardpolicy"><code>virtualkeyboardpolicy</code></a><abbr class="icon icon-experimental" title="实验性。预期行为可能会在未来发生变更。"> <span class="visually-hidden">实验性</span> </abbr></li><li><a href="/zh-CN/docs/Web/HTML/Global_attributes/writingsuggestions"><code>writingsuggestions</code></a></li></ol> </details> </li> <li class="toggle"> <details> <summary>属性</summary> <ol> <li><a href="/zh-CN/docs/Web/HTML/Attributes/accept">accept</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/autocomplete">autocomplete</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/capture">capture</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/crossorigin">crossorigin</a></li> <li><a class="only-in-en-us" title="此页面目前仅提供英文版本" href="/en-US/docs/Web/HTML/Attributes/dirname">dirname</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/disabled">disabled</a></li> <li><a class="only-in-en-us" title="此页面目前仅提供英文版本" href="/en-US/docs/Web/HTML/Attributes/elementtiming">elementtiming</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/for">for</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/max">max</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/maxlength">maxlength</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/min">min</a></li> <li><a class="only-in-en-us" title="此页面目前仅提供英文版本" href="/en-US/docs/Web/HTML/Attributes/minlength">minlength</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/multiple">multiple</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/pattern">pattern</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/placeholder">placeholder</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/readonly">readonly</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/rel">rel</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/required">required</a></li> <li><a href="/zh-CN/docs/Web/HTML/Attributes/size">size</a></li> <li><a class="only-in-en-us" title="此页面目前仅提供英文版本" href="/en-US/docs/Web/HTML/Attributes/step">step</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary><code><input></code> 类型</summary> <ol><li><a href="/zh-CN/docs/Web/HTML/Element/input/button"><code><input type="button"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/checkbox"><code><input type="checkbox"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/color"><code><input type="color"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/date"><code><input type="date"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/datetime-local"><code><input type="datetime-local"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/email"><code><input type="email"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/file"><code><input type="file"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/hidden"><code><input type="hidden"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/image"><code><input type="image"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/month"><code><input type="month"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/number"><code><input type="number"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/password"><code><input type="password"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/radio"><code><input type="radio"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/range"><code><input type="range"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/reset"><code><input type="reset"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/search"><code><input type="search"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/submit"><code><input type="submit"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/tel"><code><input type="tel"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/text"><code><input type="text"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/time"><code><input type="time"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/url"><code><input type="url"></code></a></li><li><a href="/zh-CN/docs/Web/HTML/Element/input/week"><code><input type="week"></code></a></li></ol> </details> </li> <li class="section no-link">指南：</li> <li> <ol> <li><a href="/zh-CN/docs/Web/HTML/Content_categories">内容分类</a></li> <li><a href="/zh-CN/docs/Glossary/Block-level_content">块级元素</a></li> <li><a href="/zh-CN/docs/Glossary/Inline-level_content">行级元素</a></li> <li><a href="/zh-CN/docs/Web/HTML/Quirks_Mode_and_Standards_Mode">怪异模式和标准模式</a></li> <li><a href="/zh-CN/docs/Web/HTML/Date_and_time_formats">HTML 中使用的日期与时间格式</a></li> <li><a href="/zh-CN/docs/Web/HTML/Constraint_validation">约束验证</a></li> <li><a href="/zh-CN/docs/Web/HTML/Microdata">微数据</a></li> <li><a href="/zh-CN/docs/Web/HTML/microformats">微格式</a></li> <li><a href="/zh-CN/docs/Web/HTML/Viewport_meta_tag">Viewport meta 标签</a></li> <li><a href="/zh-CN/docs/Web/HTML/CORS_enabled_image">允许图片和 canvas 跨源使用</a></li> </ol> </li> </ol> </div></div><section class="place side"></section></nav></aside><div class="toc-container"><aside class="toc"><nav><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">在本文中</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#尝试一下">尝试一下</a></li><li class="document-toc-item "><a class="document-toc-link" href="#规范">规范</a></li><li class="document-toc-item "><a class="document-toc-link" href="#浏览器兼容性">浏览器兼容性</a></li><li class="document-toc-item "><a class="document-toc-link" href="#参见">参见</a></li></ul></section></div></nav></aside><section class="place side"></section></div></div><main id="content" class="main-content "><article class="main-page-content" lang="zh-CN"><header><h1>tabindex</h1><details class="baseline-indicator high"><summary><span class="indicator" role="img" aria-label="Baseline Check"></span><h2>Baseline <span class="not-bold">Widely available</span></h2><div class="browsers"><span class="engine" title="Supported in Chrome and Edge"><span class="browser chrome supported" role="img" aria-label="Chrome check"></span><span class="browser edge supported" role="img" aria-label="Edge check"></span></span><span class="engine" title="Supported in Firefox"><span class="browser firefox supported" role="img" aria-label="Firefox check"></span></span><span class="engine" title="Supported in Safari"><span class="browser safari supported" role="img" aria-label="Safari check"></span></span></div><span class="icon icon-chevron "></span></summary><div class="extra"><p>This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2018.</p><ul><li><a href="/zh-CN/docs/Glossary/Baseline/Compatibility" data-glean="baseline_link_learn_more" target="_blank" class="learn-more">Learn more</a></li><li><a href="#浏览器兼容性" data-glean="baseline_link_bcd_table">See full compatibility</a></li><li><a href="https://survey.alchemer.com/s3/7634825/MDN-baseline-feedback?page=%2Fzh-CN%2Fdocs%2FWeb%2FHTML%2FGlobal_attributes%2Ftabindex&level=high" data-glean="baseline_link_feedback" class="feedback-link" target="_blank" rel="noreferrer">Report feedback</a></li></ul></div></details></header><div class="section-content"><p><strong>tabindex</strong> <a href="/zh-CN/docs/Web/HTML/Global_attributes">全局属性</a> 指示其元素是否可以聚焦，以及它是否/在何处参与顺序键盘导航（通常使用<kbd>Tab</kbd>键，因此得名）。</p></div><section aria-labelledby="尝试一下"><h2 id="尝试一下"><a href="#尝试一下">尝试一下</a></h2><div class="section-content"><iframe class="interactive is-tabbed-standard-height" height="200" src="https://interactive-examples.mdn.mozilla.net/pages/tabbed/attribute-tabindex.html" title="MDN Web Docs Interactive Example" allow="clipboard-write" loading="lazy"></iframe> <p>它接受一个整数作为值，具有不同的结果，具体取决于整数的值：</p> <ul> <li>tabindex=负值 (通常是 tabindex=“-1”)，表示元素是可聚焦的，但是不能通过键盘导航来访问到该元素，用 JS 做页面小组件内部键盘导航的时候非常有用。</li> <li><code>tabindex="0"</code> ，表示元素是可聚焦的，并且可以通过键盘导航来聚焦到该元素，它的相对顺序是当前处于的 DOM 结构来决定的。</li> <li>tabindex=正值，表示元素是可聚焦的，并且可以通过键盘导航来访问到该元素；它的相对顺序按照<strong>tabindex</strong> 的数值递增而滞后获焦。如果多个元素拥有相同的 <strong>tabindex</strong>，它们的相对顺序按照他们在当前 DOM 中的先后顺序决定。</li> </ul> <p>根据键盘序列导航的顺序，值为 <code>0</code> 、非法值、或者没有 <strong>tabindex</strong> 值的元素应该放置在 <strong>tabindex</strong> 值为正值的元素后面。</p> <p>如果我们在 <a href="/zh-CN/docs/Web/HTML/Element/div"><code><div></code></a> 上设置了 <code>tabindex</code> 属性，它的子元素内容不能使用箭头键来滚动，除非我们在内容上也设置 <code>tabindex</code>。<a href="https://jsfiddle.net/jainakshay/0b2q4Lgv/" class="external" target="_blank">查看这篇 fiddle 来理解 tabindex 的滚动影响</a>。</p> <div class="notecard note"> <p><strong>备注：</strong>tabindex 的最大值不应超过 32767。如果没有指定，它的默认值为 0。</p> </div></div></section><h2 id="规范"><a href="#规范">规范</a></h2><table class="standard-table"><thead><tr><th scope="col">Specification</th></tr></thead><tbody><tr><td><a href="https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindex">HTML Standard <br/><small># attr-tabindex</small></a></td></tr></tbody></table><h2 id="浏览器兼容性"><a href="#浏览器兼容性">浏览器兼容性</a></h2><p>BCD tables only load in the browser<noscript> with JavaScript enabled. Enable JavaScript to view data.</noscript></p><section aria-labelledby="参见"><h2 id="参见"><a href="#参见">参见</a></h2><div class="section-content"><ul> <li>所有<a href="/zh-CN/docs/Web/HTML/Global_attributes">全局属性</a></li> <li>反映这个属性的 <a class="only-in-en-us" title="此页面目前仅提供英文版本" href="/en-US/docs/Web/API/HTMLElement/tabIndex"><code>HTMLElement.tabIndex</code></a></li> <li>tabindex 的无障碍问题：请见 <a href="https://adrianroselli.com/2014/11/dont-use-tabindex-greater-than-0.html" class="external" target="_blank">不要使用大于 0 的 Tabindex | Adrian Roselli</a>。</li> </ul></div></section></article><aside class="article-footer"><div class="article-footer-inner"><div class="svg-container"><svg xmlns="http://www.w3.org/2000/svg" width="162" height="162" viewBox="0 0 162 162" fill="none" role="none"><mask id="b" fill="#fff"><path d="M97.203 47.04c8.113-7.886 18.004-13.871 28.906-17.492a78 78 0 0 1 33.969-3.39c11.443 1.39 22.401 5.295 32.024 11.411s17.656 14.28 23.476 23.86c5.819 9.579 9.269 20.318 10.083 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class=\"toggle\">\n <details>\n <summary>HTML 表格</summary>\n <ol>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Tables\">HTML 表格概述</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Tables/Basics\">HTML 表格基础</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Tables/Advanced\">HTML 高级表格特性和无障碍</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Tables/Structuring_planet_data\">测验：构建行星数据</a></li>\n </ol>\n </details>\n </li>\n <li class=\"section\"><a href=\"/zh-CN/docs/Web/HTML/Reference\">参考：</a></li>\n <li class=\"toggle\">\n <details>\n <summary>HTML 元素</summary>\n <ol><li><a href=\"/zh-CN/docs/Web/HTML/Element/a\"><code><a></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/abbr\"><code><abbr></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/acronym\"><code><acronym></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/address\"><code><address></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/area\"><code><area></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/article\"><code><article></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/aside\"><code><aside></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/audio\"><code><audio></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/b\"><code><b></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/base\"><code><base></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/bdi\"><code><bdi></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/bdo\"><code><bdo></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/big\"><code><big></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/blockquote\"><code><blockquote></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/body\"><code><body></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/br\"><code><br></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/button\"><code><button></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/canvas\"><code><canvas></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/caption\"><code><caption></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/center\"><code><center></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/cite\"><code><cite></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/code\"><code><code></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/col\"><code><col></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/colgroup\"><code><colgroup></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/data\"><code><data></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/datalist\"><code><datalist></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dd\"><code><dd></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/del\"><code><del></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/details\"><code><details></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dfn\"><code><dfn></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dialog\"><code><dialog></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dir\"><code><dir></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/div\"><code><div></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dl\"><code><dl></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/dt\"><code><dt></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/em\"><code><em></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/embed\"><code><embed></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/fencedframe\"><code><fencedframe></code></a><abbr class=\"icon icon-experimental\" title=\"实验性。预期行为可能会在未来发生变更。\">\n <span class=\"visually-hidden\">实验性</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/fieldset\"><code><fieldset></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/figcaption\"><code><figcaption></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/figure\"><code><figure></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/font\"><code><font></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/footer\"><code><footer></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/form\"><code>form</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/frame\"><code><frame></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/frameset\"><code><frameset></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/Heading_Elements\"><code><h1></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/head\"><code><head></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/header\"><code><header></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/hgroup\"><code><hgroup></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/hr\"><code><hr></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/html\"><code><html></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/i\"><code><i></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/iframe\"><code><iframe></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/img\"><code><img></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input\"><code><input></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/ins\"><code><ins></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/kbd\"><code><kbd></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/label\"><code><label></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/legend\"><code><legend></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/li\"><code><li></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/link\"><code><link></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/main\"><code><main></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/map\"><code><map></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/mark\"><code><mark></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/marquee\"><code><marquee></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/menu\"><code><menu></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/meta\"><code><meta></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/meter\"><code><meter></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/nav\"><code><nav></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/nobr\"><code><nobr></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/noembed\"><code><noembed></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/noframes\"><code><noframes></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/noscript\"><code><noscript></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/object\"><code><object></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/ol\"><code><ol></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/optgroup\"><code><optgroup></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/option\"><code><option></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/output\"><code><output></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/p\"><code><p></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/param\"><code><param></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/picture\"><code><picture></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/plaintext\"><code><plaintext></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/portal\"><code><portal></code></a><abbr class=\"icon icon-experimental\" title=\"实验性。预期行为可能会在未来发生变更。\">\n <span class=\"visually-hidden\">实验性</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/pre\"><code><pre></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/progress\"><code><progress></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/q\"><code><q></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/rb\"><code><rb></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/rp\"><code><rp></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/rt\"><code><rt></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/rtc\"><code><rtc></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/ruby\"><code><ruby></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/s\"><code><s></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/samp\"><code><samp></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/script\"><code><script></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/search\"><code><search></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/section\"><code><section></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/select\"><code><select></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/slot\"><code><slot></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/small\"><code><small></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/source\"><code><source></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/span\"><code><span></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/strike\"><code><strike></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/strong\"><code><strong></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/style\"><code><style></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/sub\"><code><sub></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/summary\"><code><summary></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/sup\"><code><sup></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/table\"><code><table></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/tbody\"><code><tbody></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/td\"><code><td></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/template\"><code><template></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/textarea\"><code><textarea></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/tfoot\"><code><tfoot></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/th\"><code><th></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/thead\"><code><thead></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/time\"><code><time></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/title\"><code><title></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/tr\"><code><tr></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/track\"><code><track></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/tt\"><code><tt></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/u\"><code><u></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/ul\"><code><ul></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/var\"><code><var></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/video\"><code><video></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/wbr\"><code><wbr></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/xmp\"><code><xmp></code></a><abbr class=\"icon icon-deprecated\" title=\"已弃用。请不要在新的网站中使用。\">\n <span class=\"visually-hidden\">已弃用</span>\n</abbr></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details open=\"\">\n <summary>全局属性</summary>\n <ol><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/accesskey\"><code>accesskey</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/anchor\"><code>anchor</code></a><abbr class=\"icon icon-experimental\" title=\"实验性。预期行为可能会在未来发生变更。\">\n <span class=\"visually-hidden\">实验性</span>\n</abbr><abbr class=\"icon icon-nonstandard\" title=\"非标准。请在使用前检查跨浏览器支持。\">\n <span class=\"visually-hidden\">非标准</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/autocapitalize\"><code>autocapitalize</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/autocorrect\"><code>autocorrect</code></a><abbr class=\"icon icon-experimental\" title=\"实验性。预期行为可能会在未来发生变更。\">\n <span class=\"visually-hidden\">实验性</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/autofocus\"><code>autofocus</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/class\"><code>class</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/contenteditable\"><code>contenteditable</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/data-*\"><code>data-*</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/dir\"><code>dir</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/draggable\"><code>draggable</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/enterkeyhint\"><code>enterkeyhint</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/exportparts\"><code>exportparts</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/hidden\"><code>hidden</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/id\"><code>id</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/inert\"><code>inert</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/inputmode\"><code>inputmode</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/is\"><code>is</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/itemid\"><code>itemid</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/itemprop\"><code>itemprop</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/itemref\"><code>itemref</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/itemscope\"><code>itemscope</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/itemtype\"><code>itemtype</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/lang\"><code>lang</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/nonce\"><code>nonce</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/part\"><code>part</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/popover\"><code>popover</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/slot\"><code>slot</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/spellcheck\"><code>spellcheck</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/style\"><code>style</code></a></li><li><em><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/tabindex\" aria-current=\"page\"><code>tabindex</code></a></em></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/title\"><code>title</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/translate\"><code>translate</code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/virtualkeyboardpolicy\"><code>virtualkeyboardpolicy</code></a><abbr class=\"icon icon-experimental\" title=\"实验性。预期行为可能会在未来发生变更。\">\n <span class=\"visually-hidden\">实验性</span>\n</abbr></li><li><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/writingsuggestions\"><code>writingsuggestions</code></a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>属性</summary>\n <ol>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/accept\">accept</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/autocomplete\">autocomplete</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/capture\">capture</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/crossorigin\">crossorigin</a></li>\n \n <li><a class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\" href=\"/en-US/docs/Web/HTML/Attributes/dirname\">dirname</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/disabled\">disabled</a></li>\n \n <li><a class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\" href=\"/en-US/docs/Web/HTML/Attributes/elementtiming\">elementtiming</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/for\">for</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/max\">max</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/maxlength\">maxlength</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/min\">min</a></li>\n \n <li><a class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\" href=\"/en-US/docs/Web/HTML/Attributes/minlength\">minlength</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/multiple\">multiple</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/pattern\">pattern</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/placeholder\">placeholder</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/readonly\">readonly</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/rel\">rel</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/required\">required</a></li>\n \n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/size\">size</a></li>\n \n <li><a class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\" href=\"/en-US/docs/Web/HTML/Attributes/step\">step</a></li>\n \n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary><code><input></code> 类型</summary>\n <ol><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/button\"><code><input type=\"button\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/checkbox\"><code><input type=\"checkbox\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/color\"><code><input type=\"color\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/date\"><code><input type=\"date\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/datetime-local\"><code><input type=\"datetime-local\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/email\"><code><input type=\"email\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/file\"><code><input type=\"file\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/hidden\"><code><input type=\"hidden\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/image\"><code><input type=\"image\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/month\"><code><input type=\"month\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/number\"><code><input type=\"number\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/password\"><code><input type=\"password\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/radio\"><code><input type=\"radio\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/range\"><code><input type=\"range\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/reset\"><code><input type=\"reset\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/search\"><code><input type=\"search\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/submit\"><code><input type=\"submit\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/tel\"><code><input type=\"tel\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/text\"><code><input type=\"text\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/time\"><code><input type=\"time\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/url\"><code><input type=\"url\"></code></a></li><li><a href=\"/zh-CN/docs/Web/HTML/Element/input/week\"><code><input type=\"week\"></code></a></li></ol>\n </details>\n </li>\n <li class=\"section no-link\">指南：</li>\n <li>\n <ol>\n <li><a href=\"/zh-CN/docs/Web/HTML/Content_categories\">内容分类</a></li>\n <li><a href=\"/zh-CN/docs/Glossary/Block-level_content\">块级元素</a></li>\n <li><a href=\"/zh-CN/docs/Glossary/Inline-level_content\">行级元素</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Quirks_Mode_and_Standards_Mode\">怪异模式和标准模式</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Date_and_time_formats\">HTML 中使用的日期与时间格式</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Constraint_validation\">约束验证</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Microdata\">微数据</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/microformats\">微格式</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Viewport_meta_tag\">Viewport meta 标签</a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/CORS_enabled_image\">允许图片和 canvas 跨源使用</a></li>\n </ol>\n </li>\n </ol>\n","sidebarMacro":"HTMLSidebar","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p><strong>tabindex</strong> <a href=\"/zh-CN/docs/Web/HTML/Global_attributes\">全局属性</a> 指示其元素是否可以聚焦，以及它是否/在何处参与顺序键盘导航（通常使用<kbd>Tab</kbd>键，因此得名）。</p>"}},{"type":"prose","value":{"id":"尝试一下","title":"尝试一下","isH3":false,"content":"<iframe class=\"interactive is-tabbed-standard-height\" height=\"200\" src=\"https://interactive-examples.mdn.mozilla.net/pages/tabbed/attribute-tabindex.html\" title=\"MDN Web Docs Interactive Example\" allow=\"clipboard-write\" loading=\"lazy\"></iframe>\n<p>它接受一个整数作为值，具有不同的结果，具体取决于整数的值：</p>\n<ul>\n <li>tabindex=负值 (通常是 tabindex=“-1”)，表示元素是可聚焦的，但是不能通过键盘导航来访问到该元素，用 JS 做页面小组件内部键盘导航的时候非常有用。</li>\n <li><code>tabindex=\"0\"</code> ，表示元素是可聚焦的，并且可以通过键盘导航来聚焦到该元素，它的相对顺序是当前处于的 DOM 结构来决定的。</li>\n <li>tabindex=正值，表示元素是可聚焦的，并且可以通过键盘导航来访问到该元素；它的相对顺序按照<strong>tabindex</strong> 的数值递增而滞后获焦。如果多个元素拥有相同的 <strong>tabindex</strong>，它们的相对顺序按照他们在当前 DOM 中的先后顺序决定。</li>\n</ul>\n<p>根据键盘序列导航的顺序，值为 <code>0</code> 、非法值、或者没有 <strong>tabindex</strong> 值的元素应该放置在 <strong>tabindex</strong> 值为正值的元素后面。</p>\n<p>如果我们在 <a href=\"/zh-CN/docs/Web/HTML/Element/div\"><code><div></code></a> 上设置了 <code>tabindex</code> 属性，它的子元素内容不能使用箭头键来滚动，除非我们在内容上也设置 <code>tabindex</code>。<a href=\"https://jsfiddle.net/jainakshay/0b2q4Lgv/\" class=\"external\" target=\"_blank\">查看这篇 fiddle 来理解 tabindex 的滚动影响</a>。</p>\n<div class=\"notecard note\">\n <p><strong>备注：</strong>tabindex 的最大值不应超过 32767。如果没有指定，它的默认值为 0。</p>\n</div>"}},{"type":"specifications","value":{"title":"规范","id":"规范","isH3":false,"specifications":[{"bcdSpecificationURL":"https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindex","title":"HTML Standard"}],"query":"html.global_attributes.tabindex"}},{"type":"browser_compatibility","value":{"title":"浏览器兼容性","id":"浏览器兼容性","isH3":false,"query":"html.global_attributes.tabindex"}},{"type":"prose","value":{"id":"参见","title":"参见","isH3":false,"content":"<ul>\n <li>所有<a href=\"/zh-CN/docs/Web/HTML/Global_attributes\">全局属性</a></li>\n <li>反映这个属性的 <a class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\" href=\"/en-US/docs/Web/API/HTMLElement/tabIndex\"><code>HTMLElement.tabIndex</code></a></li>\n <li>tabindex 的无障碍问题：请见 <a href=\"https://adrianroselli.com/2014/11/dont-use-tabindex-greater-than-0.html\" class=\"external\" target=\"_blank\">不要使用大于 0 的 Tabindex | Adrian Roselli</a>。</li>\n</ul>"}}],"toc":[{"text":"尝试一下","id":"尝试一下"},{"text":"规范","id":"规范"},{"text":"浏览器兼容性","id":"浏览器兼容性"},{"text":"参见","id":"参见"}],"summary":"tabindex 全局属性指示其元素是否可以聚焦，以及它是否/在何处参与顺序键盘导航（通常使用Tab键，因此得名）。","popularity":0,"modified":"2024-07-27T04:21:30.000Z","other_translations":[{"locale":"de","title":"tabindex","native":"Deutsch"},{"locale":"en-US","title":"tabindex","native":"English (US)"},{"locale":"es","title":"tabindex","native":"Español"},{"locale":"fr","title":"tabindex","native":"Français"},{"locale":"ja","title":"tabindex","native":"日本語"},{"locale":"ko","title":"tabindex","native":"한국어"},{"locale":"pt-BR","title":"tabindex","native":"Português (do Brasil)"},{"locale":"ru","title":"tabindex","native":"Русский"}],"pageType":"unknown","source":{"folder":"zh-cn/web/html/global_attributes/tabindex","github_url":"https://github.com/mdn/translated-content/blob/main/files/zh-cn/web/html/global_attributes/tabindex/index.md","last_commit_url":"https://github.com/mdn/translated-content/commit/066f0b9f610a2a871f1ccb1ffd4dfaa8e5682798","filename":"index.md"},"short_title":"tabindex","parents":[{"uri":"/zh-CN/docs/Web","title":"面向开发者的 Web 技术"},{"uri":"/zh-CN/docs/Web/HTML","title":"HTML（超文本标记语言）"},{"uri":"/zh-CN/docs/Web/HTML/Global_attributes","title":"全局属性"},{"uri":"/zh-CN/docs/Web/HTML/Global_attributes/tabindex","title":"tabindex"}],"pageTitle":"tabindex - HTML（超文本标记语言） | MDN","noIndexing":false}}</script></body></html>