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What do you know about the usage of HTML colgroup tag? Detailed introduction to colgroup usage and col
What do you know about the usage of HTML colgroup tag? Detailed introduction to colgroup usage and col
html中colgroup是什么意思？HTML colgroup标签的用法你又知道哪些？在这里，本篇文章就为大家介绍了关于HTML colgroup标签的用法详解，还有colgroup和col元素的详细介绍，还不赶紧看过来。
关于HTML colgroup标签的定义和用法：
如需对全部列应用样式，
两个 colgroup 元素为表格中的三列规定了不同的对齐方式和样式（注意第一个 colgroup 元素横跨两列）：
<table width="100%" border="1">
<colgroup span="2" align="left"></colgroup>
<colgroup align="right" style="color:#0000FF;"></colgroup>
<tr>
<th>ISBN</th>
<th>Title</th>
<th>Price</th>
</tr>
<tr>
<td>3476896</td>
<td>My first HTML</td>
<td>$53</td>
</tr>
</table>浏览器支持
所有主流浏览器都支持
Firefox、Chrome 以及 Safari 仅支持 colgroup 元素的 span 和 width 属性。
HTML colgroup的可选属性，如下图：
关于HTML colgroup和col元素的提示和注释：
提示：请为
注释：col 元素是仅包含属性的空元素。如需创建列，您就必须在 tr 元素内部规定 td 元素。
col标签为表格中一个或多个列定义属性值。 colgroup标签用于对表格中的列进行组合，以便对其进行格式化。
关于HTML colgroup标签和col元素的具体作用如下：
它们的作用主要就是来控制单元格的宽度了，这样省去单独定义每个单元格的麻烦，过去我们往往是在第一行中的th或者td上定义宽度来规定每列的宽度，而col不但可以定义宽度还能同时定义其他的属性，例如可以通过col来控制几列宽度的总和，还可以控制这列的背景色。但理想是丰满的，现实是骨干的，正如前面所说，功能越大不代表其兼容性也越强，据现有的测试下来，col和colgroup能发挥作用还能保证兼容的应用就只有俩：width和background。对于width，个人宁愿使用常规方式，第一行设置宽度，保证列宽。对于bacground，一般实际中表格大面积使用不同背景的情况也很少见。
<html>
<body>
<TABLE border=1 span="3" width="600px">
<COLGROUP bgcolor="red" span=3>
<col width="150px" style="display: block">
<col width="300px" bgcolor=green>
<col width="150px">
</COLGROUP>
<TBODY>
<TR>
<TD>1111</TD>
<TD>222</TD>
<TD>3333</TD>
</TR>
<TR>
<TD>1111</TD>
<TD>222</TD>
<TD>3333</TD>
</TR>
<TR>
<TD>1111</TD>
<TD>222</TD>
<TD>3333</TD>
</TR>
</TABLE>
</body>
</html>【相关推荐】
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