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"></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="#语法">语法</a></li><li class="document-toc-item "><a class="document-toc-link" href="#无障碍考虑">无障碍考虑</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> <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><a href="/zh-CN/docs/Web/HTML/Global_attributes/tabindex"><code>tabindex</code></a></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 open=""> <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><em><a href="/zh-CN/docs/Web/HTML/Attributes/min" aria-current="page">min</a></em></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="#语法">语法</a></li><li class="document-toc-item "><a class="document-toc-link" href="#无障碍考虑">无障碍考虑</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>HTML 属性:min</h1></header><div class="section-content"><p><strong><code>min</code></strong> 属性定义了可接受和有效的输入最小值。如果元素的 <a href="/zh-CN/docs/Web/HTML/Element/input#value"><code>value</code></a> 小于此值,则该元素将无法通过<a href="/zh-CN/docs/Learn/Forms/Form_validation">验证</a>。此值必须小于等于 <code>max</code> 属性的值。</p> <p>某些输入类型具有默认的最小值。如果输入项没有默认的最小值,且 <code>min</code> 指定的值无法转换为有效的数字(或未设置最小值),则输入没有最小值。</p> <p>以下输入类型支持该属性:<a href="/zh-CN/docs/Web/HTML/Element/input/date">date</a>、<a href="/zh-CN/docs/Web/HTML/Element/input/month">month</a>、<a href="/zh-CN/docs/Web/HTML/Element/input/week">week</a>、<a href="/zh-CN/docs/Web/HTML/Element/input/time">time</a>、<a href="/zh-CN/docs/Web/HTML/Element/input/datetime-local">datetime-local</a>、<a href="/zh-CN/docs/Web/HTML/Element/input/number">number</a> 和 <a href="/zh-CN/docs/Web/HTML/Element/input/range">range</a> 类型,以及 <a href="/zh-CN/docs/Web/HTML/Element/meter"><code><meter></code></a> 元素。</p></div><section aria-labelledby="语法"><h2 id="语法"><a href="#语法">语法</a></h2><div class="section-content"><figure class="table-container"><table class="no-markdown"> <caption> 不同输入类型的 <code>min</code> 值语法 </caption> <thead> <tr> <th>输入类型</th> <th>语法</th> <th>示例</th> </tr> </thead> <tbody> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/date">date</a></td> <td><code>yyyy-mm-dd</code></td> <td><code><input type="date" min="2019-12-25" step="1"></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/month">month</a></td> <td><code>yyyy-mm</code></td> <td><code><input type="month" min="2019-12" step="12"></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/week">week</a></td> <td><code>yyyy-W##</code></td> <td><code><input type="week" min="2019-W23" step=""></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/time">time</a></td> <td><code>HH:mm</code></td> <td><code><input type="time" min="09:00" step="900"></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/datetime-local">datetime-local</a></td> <td><code>yyyy-mm-ddTHH:mm</code></td> <td><code><input type="datetime-local" min="2019-12-25T19:30"></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/number">number</a></td> <td><a href="/zh-CN/docs/Web/CSS/number"><number></a></td> <td><code><input type="number" min="0" step="5" max="100"></code></td> </tr> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/input/range">range</a></td> <td><a href="/zh-CN/docs/Web/CSS/number"><number></a></td> <td><code><input type="range" min="60" step="5" max="100"></code></td> </tr> </tbody> </table></figure> <div class="notecard note"> <p><strong>备注:</strong>当用户输入的数据不符合设置的 min 值时,该值在约束验证中被视为无效,并会匹配 <a href="/zh-CN/docs/Web/CSS/:invalid"><code>:invalid</code></a> 和 <a href="/zh-CN/docs/Web/CSS/:out-of-range"><code>:out-of-range</code></a> 伪类。</p> </div> <p>参阅<a href="/zh-CN/docs/Web/HTML/Constraint_validation">客户端验证</a>和 <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/ValidityState/rangeUnderflow"><code>rangeUnderflow</code></a> 获取更多信息。</p> <p>对于 <a href="/zh-CN/docs/Web/HTML/Element/meter"><code><meter></code></a> 元素,<code>min</code> 属性定义了测量范围的最小数值边界。若指定,则该值必须小于最大值(<a href="/zh-CN/docs/Web/HTML/Attributes/max"><code>max</code></a> 属性)。在两种情况下,如果省略,则默认值为 1。</p> <figure class="table-container"><table class="no-markdown"> <caption> 其他元素的 <code>min</code> 值语法 </caption> <thead> <tr> <th>输入类型</th> <th>语法</th> <th>示例</th> </tr> </thead> <tbody> <tr> <td><a href="/zh-CN/docs/Web/HTML/Element/meter"><code><meter></code></a></td> <td><a href="/zh-CN/docs/Web/CSS/number"><number></a></td> <td><code><meter id="fuel" min="0" max="100" low="33" high="66" optimum="80" value="40"> at 40/100</meter></code></td> </tr> </tbody> </table></figure></div></section><section aria-labelledby="对_step_的影响"><h3 id="对_step_的影响"><a href="#对_step_的影响">对 step 的影响</a></h3><div class="section-content"><p><code>min</code> 和 <code>step</code> 的值决定了有效的值范围,即使未包含 <code>step</code> 属性,<code>step</code> 也会默认取值为 <code>1</code>。</p> <p>我们可以为无效输入添加一个红色边框:</p> <div class="code-example"><div class="example-header"><span class="language-name">css</span></div><pre class="brush: css notranslate"><code>input:invalid { border: solid red 3px; } </code></pre></div> <p>然后定义一个最小值为 7.2 且省略了 step 属性的输入元素,此时 step 默认值为 1。</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><input id="myNumber" name="myNumber" type="number" min="7.2" value="8" /> </code></pre></div> <p>由于 <code>step</code> 的默认值为 1,因此有效值包括 <code>7.2</code>、<code>8.2</code>、<code>9.2</code> 等。而值 8 是无效的。由于我们包含了无效值,支持的浏览器将显示该值为无效。</p><div class="code-example"><div class="example-header"></div><iframe class="sample-code-frame" title="Impact on step sample" id="frame_impact_on_step" width="200" height="60" src="about:blank" data-live-path="/zh-CN/docs/Web/HTML/Attributes/min" data-live-id="impact_on_step" sandbox="allow-same-origin allow-scripts" loading="lazy"></iframe></div> <p>如果没有明确指定,<code>number</code> 和 <code>range</code> 类型的 <code>step</code> 默认值为 1,而日期、时间输入类型的 <code>step</code> 默认值为 1 个单位(秒、周、月、天)。</p></div></section><section aria-labelledby="无障碍考虑"><h2 id="无障碍考虑"><a href="#无障碍考虑">无障碍考虑</a></h2><div class="section-content"><p>提供说明以帮助用户理解如何填写表单及使用各个表单控件。指明必填和可选输入、数据格式及其他相关信息。在使用 <code>min</code> 属性时,确保用户理解该最小值要求。将说明放置在 <a href="/zh-CN/docs/Web/HTML/Element/label"><code><label></code></a> 标签内通常即可满足需求。如果需要在标签之外提供上述说明以实现更灵活的布局设计,请考虑使用 <a href="/zh-CN/docs/Web/Accessibility/ARIA/Attributes/aria-labelledby"><code>aria-labelledby</code></a> 或 <a href="/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-describedby" class="only-in-en-us" title="此页面目前仅提供英文版本"><code>aria-describedby</code></a>。</p></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/input.html#attr-input-min">HTML Standard<!-- --> <br/><small># <!-- -->attr-input-min</small></a></td></tr><tr><td><a href="https://html.spec.whatwg.org/multipage/form-elements.html#attr-meter-max">HTML Standard<!-- --> <br/><small># <!-- -->attr-meter-max</small></a></td></tr></tbody></table><section aria-labelledby="浏览器兼容性"><h2 id="浏览器兼容性"><a href="#浏览器兼容性">浏览器兼容性</a></h2><div class="section-content"></div></section><h3 id="html.elements.input.min"><a href="#html.elements.input.min">html.elements.input.min</a></h3><p>BCD tables only load in the browser<noscript> <!-- -->with JavaScript enabled. Enable JavaScript to view data.</noscript></p><h3 id="html.elements.meter.min"><a href="#html.elements.meter.min">html.elements.meter.min</a></h3><p>BCD tables only load in the browser<noscript> <!-- -->with JavaScript enabled. 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Content available under<!-- --> <a href="/zh-CN/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"url":"/zh-CN/docs/Web/HTML/Attributes/min","doc":{"isMarkdown":true,"isTranslated":true,"isActive":true,"flaws":{},"title":"HTML 属性:min","mdn_url":"/zh-CN/docs/Web/HTML/Attributes/min","locale":"zh-CN","native":"中文 (简体)","browserCompat":["html.elements.input.min","html.elements.meter.min"],"sidebarHTML":"\n <ol>\n <li class=\"section\"><a href=\"/zh-CN/docs/Web/HTML\">HTML</a></li>\n <li class=\"section\"><a href=\"/zh-CN/docs/Learn/HTML\">教程</a></li>\n <li><a href=\"/zh-CN/docs/Learn/Getting_started_with_the_web/HTML_basics\">HTML 基础</a></li>\n <li class=\"toggle\">\n <details>\n <summary>HTML 介绍</summary>\n <ol>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML\">HTML 概述</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Getting_started\">开始学习 HTML</a></li>\n <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>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/HTML_text_fundamentals\">HTML 文本基础</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Creating_hyperlinks\">建立超链接</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Advanced_text_formatting\">高级文本格式</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Document_and_website_structure\">文档和网站架构</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Debugging_HTML\">HTML 调试</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Introduction_to_HTML/Marking_up_a_letter\">测验:标记信件</a></li>\n <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>\n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>多媒体与嵌入</summary>\n <ol>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Multimedia_and_embedding\">多媒体与嵌入概述</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Images_in_HTML\">HTML 中的图片</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Video_and_audio_content\">视频和音频内容</a></li>\n <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>\n <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>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Responsive_images\">响应式图片</a></li>\n <li><a href=\"/zh-CN/docs/Learn/HTML/Multimedia_and_embedding/Mozilla_splash_page\">测验:Mozilla 醒目页面</a></li>\n </ol>\n </details>\n </li>\n <li 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>\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><a href=\"/zh-CN/docs/Web/HTML/Global_attributes/tabindex\"><code>tabindex</code></a></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 open=\"\">\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><em><a href=\"/zh-CN/docs/Web/HTML/Attributes/min\" aria-current=\"page\">min</a></em></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><code>min</code></strong> 属性定义了可接受和有效的输入最小值。如果元素的 <a href=\"/zh-CN/docs/Web/HTML/Element/input#value\"><code>value</code></a> 小于此值,则该元素将无法通过<a href=\"/zh-CN/docs/Learn/Forms/Form_validation\">验证</a>。此值必须小于等于 <code>max</code> 属性的值。</p>\n<p>某些输入类型具有默认的最小值。如果输入项没有默认的最小值,且 <code>min</code> 指定的值无法转换为有效的数字(或未设置最小值),则输入没有最小值。</p>\n<p>以下输入类型支持该属性:<a href=\"/zh-CN/docs/Web/HTML/Element/input/date\">date</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/month\">month</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/week\">week</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/time\">time</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/datetime-local\">datetime-local</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/number\">number</a> 和 <a href=\"/zh-CN/docs/Web/HTML/Element/input/range\">range</a> 类型,以及 <a href=\"/zh-CN/docs/Web/HTML/Element/meter\"><code><meter></code></a> 元素。</p>"}},{"type":"prose","value":{"id":"语法","title":"语法","isH3":false,"content":"<figure class=\"table-container\"><table class=\"no-markdown\">\n <caption>\n 不同输入类型的\n <code>min</code>\n 值语法\n </caption>\n <thead>\n <tr>\n <th>输入类型</th>\n <th>语法</th>\n <th>示例</th>\n </tr>\n </thead>\n <tbody>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/date\">date</a></td>\n <td><code>yyyy-mm-dd</code></td>\n <td><code><input type=\"date\" min=\"2019-12-25\" step=\"1\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/month\">month</a></td>\n <td><code>yyyy-mm</code></td>\n <td><code><input type=\"month\" min=\"2019-12\" step=\"12\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/week\">week</a></td>\n <td><code>yyyy-W##</code></td>\n <td><code><input type=\"week\" min=\"2019-W23\" step=\"\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/time\">time</a></td>\n <td><code>HH:mm</code></td>\n <td><code><input type=\"time\" min=\"09:00\" step=\"900\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/datetime-local\">datetime-local</a></td>\n <td><code>yyyy-mm-ddTHH:mm</code></td>\n <td><code><input type=\"datetime-local\" min=\"2019-12-25T19:30\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/number\">number</a></td>\n <td><a href=\"/zh-CN/docs/Web/CSS/number\"><number></a></td>\n <td><code><input type=\"number\" min=\"0\" step=\"5\" max=\"100\"></code></td>\n </tr>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/input/range\">range</a></td>\n <td><a href=\"/zh-CN/docs/Web/CSS/number\"><number></a></td>\n <td><code><input type=\"range\" min=\"60\" step=\"5\" max=\"100\"></code></td>\n </tr>\n </tbody>\n</table></figure>\n<div class=\"notecard note\">\n <p><strong>备注:</strong>当用户输入的数据不符合设置的 min 值时,该值在约束验证中被视为无效,并会匹配 <a href=\"/zh-CN/docs/Web/CSS/:invalid\"><code>:invalid</code></a> 和 <a href=\"/zh-CN/docs/Web/CSS/:out-of-range\"><code>:out-of-range</code></a> 伪类。</p>\n</div>\n<p>参阅<a href=\"/zh-CN/docs/Web/HTML/Constraint_validation\">客户端验证</a>和 <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/ValidityState/rangeUnderflow\"><code>rangeUnderflow</code></a> 获取更多信息。</p>\n<p>对于 <a href=\"/zh-CN/docs/Web/HTML/Element/meter\"><code><meter></code></a> 元素,<code>min</code> 属性定义了测量范围的最小数值边界。若指定,则该值必须小于最大值(<a href=\"/zh-CN/docs/Web/HTML/Attributes/max\"><code>max</code></a> 属性)。在两种情况下,如果省略,则默认值为 1。</p>\n<figure class=\"table-container\"><table class=\"no-markdown\">\n <caption>\n 其他元素的\n <code>min</code>\n 值语法\n </caption>\n <thead>\n <tr>\n <th>输入类型</th>\n <th>语法</th>\n <th>示例</th>\n </tr>\n </thead>\n <tbody>\n <tr>\n <td><a href=\"/zh-CN/docs/Web/HTML/Element/meter\"><code><meter></code></a></td>\n <td><a href=\"/zh-CN/docs/Web/CSS/number\"><number></a></td>\n <td><code><meter id=\"fuel\" min=\"0\" max=\"100\" low=\"33\" high=\"66\" optimum=\"80\" value=\"40\"> at 40/100</meter></code></td>\n </tr>\n </tbody>\n</table></figure>"}},{"type":"prose","value":{"id":"对_step_的影响","title":"对 step 的影响","isH3":true,"content":"<p><code>min</code> 和 <code>step</code> 的值决定了有效的值范围,即使未包含 <code>step</code> 属性,<code>step</code> 也会默认取值为 <code>1</code>。</p>\n<p>我们可以为无效输入添加一个红色边框:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">css</span></div><pre class=\"brush: css notranslate\"><code>input:invalid {\n border: solid red 3px;\n}\n</code></pre></div>\n<p>然后定义一个最小值为 7.2 且省略了 step 属性的输入元素,此时 step 默认值为 1。</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><input id=\"myNumber\" name=\"myNumber\" type=\"number\" min=\"7.2\" value=\"8\" />\n</code></pre></div>\n<p>由于 <code>step</code> 的默认值为 1,因此有效值包括 <code>7.2</code>、<code>8.2</code>、<code>9.2</code> 等。而值 8 是无效的。由于我们包含了无效值,支持的浏览器将显示该值为无效。</p><div class=\"code-example\"><div class=\"example-header\"></div><iframe class=\"sample-code-frame\" title=\"Impact on step sample\" id=\"frame_impact_on_step\" width=\"200\" height=\"60\" src=\"about:blank\" data-live-path=\"/zh-CN/docs/Web/HTML/Attributes/min\" data-live-id=\"impact_on_step\" sandbox=\"allow-same-origin allow-scripts\" loading=\"lazy\"></iframe></div>\n<p>如果没有明确指定,<code>number</code> 和 <code>range</code> 类型的 <code>step</code> 默认值为 1,而日期、时间输入类型的 <code>step</code> 默认值为 1 个单位(秒、周、月、天)。</p>"}},{"type":"prose","value":{"id":"无障碍考虑","title":"无障碍考虑","isH3":false,"content":"<p>提供说明以帮助用户理解如何填写表单及使用各个表单控件。指明必填和可选输入、数据格式及其他相关信息。在使用 <code>min</code> 属性时,确保用户理解该最小值要求。将说明放置在 <a href=\"/zh-CN/docs/Web/HTML/Element/label\"><code><label></code></a> 标签内通常即可满足需求。如果需要在标签之外提供上述说明以实现更灵活的布局设计,请考虑使用 <a href=\"/zh-CN/docs/Web/Accessibility/ARIA/Attributes/aria-labelledby\"><code>aria-labelledby</code></a> 或 <a href=\"/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-describedby\" class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\"><code>aria-describedby</code></a>。</p>"}},{"type":"specifications","value":{"title":"规范","id":"规范","isH3":false,"specifications":[{"bcdSpecificationURL":"https://html.spec.whatwg.org/multipage/input.html#attr-input-min","title":"HTML Standard"},{"bcdSpecificationURL":"https://html.spec.whatwg.org/multipage/form-elements.html#attr-meter-max","title":"HTML Standard"}],"query":"html.elements.input.min,html.elements.meter.min"}},{"type":"prose","value":{"id":"浏览器兼容性","title":"浏览器兼容性","isH3":false,"content":""}},{"type":"browser_compatibility","value":{"title":"html.elements.input.min","id":"html.elements.input.min","isH3":true,"query":"html.elements.input.min"}},{"type":"browser_compatibility","value":{"title":"html.elements.meter.min","id":"html.elements.meter.min","isH3":true,"query":"html.elements.meter.min"}},{"type":"prose","value":{"id":"参见","title":"参见","isH3":false,"content":"<ul>\n <li><a href=\"/en-US/docs/Web/HTML/Attributes/step\" class=\"only-in-en-us\" title=\"此页面目前仅提供英文版本\"><code>step</code></a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Attributes/max\"><code>max</code></a></li>\n <li>其他 meter 属性:<a class=\"page-not-created\" title=\"此文档尚未被撰写,期待你的贡献!\" data-href=\"/zh-CN/docs/Web/HTML/Attributes/low\"><code>low</code></a>、<a class=\"page-not-created\" title=\"此文档尚未被撰写,期待你的贡献!\" data-href=\"/zh-CN/docs/Web/HTML/Attributes/high\"><code>high</code></a>、<a class=\"page-not-created\" title=\"此文档尚未被撰写,期待你的贡献!\" data-href=\"/zh-CN/docs/Web/HTML/Attributes/optimum\"><code>optimum</code></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/Learn/Forms/Form_validation\">表单验证</a></li>\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/API/ValidityState/rangeUnderflow\"><code>validityState.rangeUnderflow</code></a></li>\n <li><a href=\"/zh-CN/docs/Web/CSS/:out-of-range\"><code>:out-of-range</code></a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Element/input\"><code><input></code></a></li>\n <li><a href=\"/zh-CN/docs/Web/HTML/Element/input/date\">date</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/month\">month</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/week\">week</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/time\">time</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/datetime-local\">datetime-local</a>、<a href=\"/zh-CN/docs/Web/HTML/Element/input/number\">number</a> 和 <a href=\"/zh-CN/docs/Web/HTML/Element/input/range\">range</a> 类型,以及 <a href=\"/zh-CN/docs/Web/HTML/Element/meter\"><code><meter></code></a></li>\n</ul>"}}],"toc":[{"text":"语法","id":"语法"},{"text":"无障碍考虑","id":"无障碍考虑"},{"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":"min 属性定义了可接受和有效的输入最小值。如果元素的 value 小于此值,则该元素将无法通过验证。此值必须小于等于 max 属性的值。","popularity":0,"modified":"2024-10-29T08:23:28.000Z","other_translations":[{"locale":"de","title":"HTML-Attribut: min","native":"Deutsch"},{"locale":"en-US","title":"HTML attribute: min","native":"English (US)"},{"locale":"es","title":"HTML el atributo: min","native":"Español"},{"locale":"fr","title":"Attribut HTML : min","native":"Français"},{"locale":"ja","title":"HTML 属性: min","native":"日本語"}],"pageType":"unknown","source":{"folder":"zh-cn/web/html/attributes/min","github_url":"https://github.com/mdn/translated-content/blob/main/files/zh-cn/web/html/attributes/min/index.md","last_commit_url":"https://github.com/mdn/translated-content/commit/5e8f12c89f9ea93c400cb64ebe6926f6caca7d1a","filename":"index.md"},"short_title":"HTML 属性:min","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/Attributes","title":"HTML 属性参考"},{"uri":"/zh-CN/docs/Web/HTML/Attributes/min","title":"HTML 属性:min"}],"pageTitle":"HTML 属性:min - HTML(超文本标记语言) | MDN","noIndexing":false}}</script></body></html>