What is the function of html thead tag? Introduction to html thead tag attributes-HTML Tutorial-php.cn

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What is the function of html thead tag? Introduction to html thead tag attributes

寻∝梦

Aug 17, 2018 pm 05:37 PM

html thead标签的作用是什么？html thead标签的属性有哪些？本篇文章主要为大家介绍了html thead标签的定义个用法，还有属性介绍（附实例）

html thead标签的定义和用法：

标签定义表格的表头。该标签用于组合 HTML 表格的表头内容。

thead 元素应该与 tbody 和 tfoot 元素结合起来使用。

tbody 元素用于对 HTML 表格中的主体内容进行分组，而 tfoot 元素用于对 HTML 表格中的表注（页脚）内容进行分组。

注释：如果您使用 thead、tfoot 以及 tbody 元素，您就必须使用全部的元素。它们的出现次序是：thead、tfoot、tbody，这样浏览器就可以在收到所有数据前呈现页脚了。您必须在 table 元素内部使用这些标签。

提示：在默认情况下这些元素不会影响到表格的布局。不过，您可以使用 CSS 使这些元素改变表格的外观。

详细描述

thead、tfoot 以及 tbody 元素使您有能力对表格中的行进行分组。当您创建某个表格时，您也许希望拥有一个标题行，一些带有数据的行，以及位于底部的一个总计行。这种划分使浏览器有能力支持独立于表格标题和页脚的表格正文滚动。当长的表格被打印时，表格的表头和页脚可被打印在包含表格数据的每张页面上。

HTML标签实例：

带有 thead、tbody 以及 tfoot 元素的 HTML 表格：

<table border="1">
  <thead>
    <tr>
      <th>Month</th>
      <th>Savings</th>
    </tr>
  </thead>
  <tfoot>
    <tr>
      <td>Sum</td>
      <td>$180</td>
    </tr>
  </tfoot>
  <tbody>
    <tr>
      <td>January</td>
      <td>$100</td>
    </tr>
    <tr>
      <td>February</td>
      <td>$80</td>
    </tr>
  </tbody>
</table>

标签基本属性（html5已经不支持）

align right：元素中内容的对齐方式（值：left、center、justify、char）。
char：元素中内容根据哪个字符来对进行文本对齐（值：character）。
charoff：元素中内容的第一个对齐字符的偏移量（值：number）。
valign：元素中内容的垂直对齐方式（值：top、middle、bottom、baseline）。
标签支持html全局属性和html事件属性
html thead标签的格式：
<thead> <tr> <td>......</td> </tr> ...... </thead>
html thead标签的实例：
<!doctype html> <html> <head> <meta charset="UTF-8"> <title>html< tbody>标签笔记</title> </head> <body> <table border="1"> <thead> <tr> <th>thead1</th> <th>thead2</th> <th>thead3</th> </tr> </thead> <tfoot> <tr> <td>tfoot1</td> <td>tfoot2</td> <td>tfoot3</td> </tr> </tfoot> <tbody> <tr> <td>tbody1</td> <td>tbody2</td> <td>tbody3</td> </tr> </tbody> </table> </body> </html>
注释：内部必须拥有标签！
注释：、

以及很少被使用，这是因为糟糕的浏览器支持。我们期望在 XHTML 的未来版本中这种情况会发生变化。假如您使用 Internet Explorer 5.0 或更新的浏览器，可以在我们的 XML 教程中查看一个例子。
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