path: root/files/zh-cn/web/html/element/tr/index.html

---
title: <tr>
slug: Web/HTML/Element/tr
translation_of: Web/HTML/Element/tr
---
<p><strong>HTML <code>&lt;tr&gt;</code> 元素</strong>定义表格中的行。 同一行可同时出现{{HTMLElement("td")}} 和{{HTMLElement("th")}} 元素.</p>

<table class="properties">
 <tbody>
  <tr>
   <th scope="row"><a href="/en-US/docs/HTML/Content_categories">Content categories</a></th>
   <td>None</td>
  </tr>
  <tr>
   <th scope="row">Permitted content</th>
   <td>Zero or more {{HTMLElement("td")}} or {{HTMLElement("th")}} elements, or a mix of them</td>
  </tr>
  <tr>
   <th scope="row">Tag omission</th>
   <td>Start tag is mandatory. End tag may be omitted if the {{HTMLElement("tr")}} element is immediately followed by a {{HTMLElement("tr")}} element, or if the parent table group ({{HTMLElement("thead")}}, {{HTMLElement("tbody")}} or {{HTMLElement("tfoot")}}) element doesn't have any more content</td>
  </tr>
  <tr>
   <th scope="row">Permitted parents</th>
   <td>{{HTMLElement("table")}}, {{HTMLElement("thead")}}, {{HTMLElement("tbody")}} or {{HTMLElement("tfoot")}} element</td>
  </tr>
  <tr>
   <th scope="row">Permitted ARIA roles</th>
   <td>Any</td>
  </tr>
  <tr>
   <th scope="row">DOM interface</th>
   <td>{{domxref("HTMLTableRowElement")}}</td>
  </tr>
 </tbody>
</table>

<h2 id="Attributes">Attributes</h2>

<p>表格标签支持 <a href="https://developer.mozilla.org/en-US/docs/HTML/Global_attributes" title="HTML/Global attributes">全局特性</a>。还有一些过期的特性，你应该避免使用它们，但是可以了解它们，会在你阅读旧代码的时候有所帮助。</p>

<dl>
 <dt>{{htmlattrdef("align")}} {{deprecatedGeneric("inline","html4.01")}}, {{obsoleteGeneric("inline","html5")}}</dt>
 <dd>该枚举属性指定每个单元格中内容的水平对齐方式，可使用的属性值如下:
 <ul>
  <li><code>left</code>, 内容在单元格中左对齐</li>
  <li><code>center</code>, 内容在单元格中居中</li>
  <li><code>right</code>, 内容在单元格中右对齐</li>
  <li><code>justify</code>, 增加文本内容之间的空白以伸展这行文本，使得该单元格中的多行文本具有相同的长度。</li>
  <li><code>char</code>, aligning the textual content on a special character with a minimal offset, defined by the {{htmlattrxref("char", "tr")}} and {{htmlattrxref("charoff", "tr")}} attributes {{unimplemented_inline("2212")}}</li>
 </ul>

 <p>If this attribute is not set, the parent node's value is inherited.</p>

 <div class="note"><strong>Note: </strong>Do not use this attribute as it is obsolete (not supported) in the latest standard.

 <ul>
  <li>To achieve the same effect as the <code>left</code>, <code>center</code>, <code>right</code> or <code>justify</code> values, use the CSS {{cssxref("text-align")}} property on it.</li>
  <li>To achieve the same effect as the <code>char</code> value, in CSS3, you can use the value of the {{htmlattrxref("char", "tr")}} as the value of the {{cssxref("text-align")}} property {{unimplemented_inline}}.</li>
 </ul>
 </div>
 </dd>
</dl>

<dl>
 <dt>{{htmlattrdef("bgcolor")}} {{deprecatedGeneric("inline","html4.01")}}, {{obsoleteGeneric("inline","html5")}}</dt>
 <dd>This attribute defines the background color of each cell of the row. It can be either an <a href="/en-US/docs/Web/CSS/color_value#rgb()">hexadecimal <code>#RRGGBB</code> or <code>#RGB</code> value</a> or a <a href="/en-US/docs/Web/CSS/color_value#Color_keywords">color keyword</a>.
 <div class="note"><strong>Usage note: </strong>the {{HTMLElement("tr")}} element should be styled using <a href="/en-US/docs/CSS">CSS</a>. To give a similar effect to the <strong>bgcolor</strong> attribute, use the <a href="/en-US/docs/CSS">CSS</a> property {{cssxref("background-color")}}.</div>
 </dd>
</dl>

<dl>
 <dt>{{htmlattrdef("char")}} {{deprecatedGeneric("inline","html4.01")}}, {{obsoleteGeneric("inline","html5")}}</dt>
 <dd>This attribute is used to set the character to align the cells in a column on. Typical values for this include a period (.) when attempting to align numbers or monetary values. If {{htmlattrxref("align", "tr")}} is not set to <code>char</code>, this attribute is ignored.
 <div class="note"><strong>Note: </strong>Do not use this attribute as it is obsolete (and not supported) in the latest standard. To achieve the same effect as the {{htmlattrxref("char", "tr")}}, in CSS3, you can use the character set using the {{htmlattrxref("char", "tr")}} attribute as the value of the {{cssxref("text-align")}} property {{unimplemented_inline}}.</div>
 </dd>
</dl>

<dl>
 <dt>{{htmlattrdef("charoff")}} {{deprecatedGeneric("inline","html4.01")}}, {{obsoleteGeneric("inline","html5")}}</dt>
 <dd>This attribute is used to indicate the number of characters to offset the column data from the alignment characters specified by the <strong>char</strong> attribute.
 <div class="note"><strong>Note: </strong>Do not use this attribute as it is obsolete (and not supported) in the latest standard.</div>
 </dd>
</dl>

<dl>
 <dt>{{htmlattrdef("valign")}} {{deprecatedGeneric("inline","html4.01")}}, {{obsoleteGeneric("inline","html5")}}</dt>
 <dd>This attribute specifies the vertical alignment of the text within each row of cells of the table header. Possible values for this attribute are:
 <ul>
  <li><code>baseline</code>, which will put the text as close to the bottom of the cell as it is possible, but align it on the <a class="external" href="https://en.wikipedia.org/wiki/Baseline_%28typography%29">baseline</a> of the characters instead of the bottom of them. If characters are all of the size, this has the same effect as <code>bottom</code>.</li>
  <li><code>bottom</code>, which will put the text as close to the bottom of the cell as it is possible;</li>
  <li><code>middle</code>, which will center the text in the cell;</li>
  <li>and <code>top</code>, which will put the text as close to the top of the cell as it is possible.</li>
 </ul>

 <div class="note"><strong>Note: </strong>Do not use this attribute as it is obsolete (and not supported) in the latest standard: instead set the CSS {{cssxref("vertical-align")}} property on it.</div>
 </dd>
</dl>

<h2 id="Examples">Examples</h2>

<p>See {{HTMLElement("table")}} for examples on <code>&lt;tr&gt;</code>.</p>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('HTML WHATWG','tables.html#the-tr-element','tr element')}}</td>
   <td>{{Spec2('HTML WHATWG')}}</td>
   <td></td>
  </tr>
  <tr>
   <td>{{SpecName('HTML5 W3C','tabular-data.html#the-tr-element','tr element')}}</td>
   <td>{{Spec2('HTML5 W3C')}}</td>
   <td></td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Edge</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoDesktop("1.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>align/valign</code> attribute</td>
   <td>1.0</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}} [1]</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>char/charoff</code> attribute</td>
   <td>1.0</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}} [2]</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>bgcolor</code> attribute {{Non-standard_inline}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Edge</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoMobile("1.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>align/valign</code> attribute</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}} [1]</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>char/charoff</code> attribute</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}} [2]</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>bgcolor</code> attribute {{Non-standard_inline}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] See {{bug(915)}}.</p>

<p>[2] See {{bug(2212)}}.</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>Other table-related HTML Elements: {{HTMLElement("caption")}}, {{HTMLElement("col")}}, {{HTMLElement("colgroup")}}, {{HTMLElement("table")}}, {{HTMLElement("tbody")}}, {{HTMLElement("td")}}, {{HTMLElement("tfoot")}}, {{HTMLElement("th")}}, {{HTMLElement("thead")}};</li>
 <li>CSS properties and pseudo-classes that may be specially useful to style the <code>&lt;tr&gt;</code> element:
  <ul>
   <li>the {{cssxref(":nth-child")}} pseudo-class to set the alignment on the cells of the column;</li>
   <li>the {{cssxref("text-align")}} property to align all cells content on the same character, like '.'.&lt;</li>
  </ul>
 </li>
</ul>

<p>{{HTMLRef}}</p>