我想为所有DataTables（带滚动插件）列设置静态宽度。
如果我为除{1}之外的所有<th>标签设置宽度，它会使列更宽。如果为所有标签设置了宽度，它就不起作用。另外，当我通过开发人员工具进行检查时，我看不到任何宽度为<th>的{{1}}元素。元素的宽度不同：400px，115px，132px ...
为什么？如何设置列的确切宽度？
CSS
145pxJS
.big-col {
width: 400px;
}
完整示例：http://fiddle.jshell.net/sergibondarenko/o1hoabep/8/
另外，我尝试了columnDefs选项，但没有成功。
var options = {
"sScrollX": "100%",
"sScrollXInner": "110%",
"bScrollCollapse": true,
"colReorder": true
};
$(document).ready(function() {
$('#example').dataTable(options);
});
确切的列数未知。 HTML表是根据服务器端的数据动态构建的。
答案 0 :(得分：11)
th.big-col{
width:400px !important;
}
table#example{
table-layout:fixed;
}
宽度的!important必须覆盖由数据表应用的任何内联样式，以及jsfiddle或其他可能应用的其他样式。
table-layout:fixed;将使表格渲染器优先考虑第一行中单元格的宽度，以确定每列中所有单元格的宽度。
更新：小提琴似乎失败了，所以我将其嵌入为代码段：
let options = {
"sScrollX": "100%",
"sScrollXInner": "110%",
"bScrollCollapse": true,
"colReorder": true
};
$(document).ready(function() {
$('#example').dataTable(options);
});.big-col {
width: 400px !important;
}
table#example{
table-layout:fixed;
}
<title>Example 1 - apply dataTable()</title>
<head>
<link rel="stylesheet" type="text/css" href="http://ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.0/css/jquery.dataTables.css">
<link rel="stylesheet" type="text/css" href="http://ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.0/css/jquery.dataTables_themeroller.css">
<script type="text/javascript" charset="utf8" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.1.min.js"></script>
<script type="text/javascript" charset="utf8" src="http://ajax.aspnetcdn.com/ajax/jquery.dataTables/1.9.0/jquery.dataTables.min.js"></script>
</head>
<body>
<div class="container">
<table cellpadding="0" cellspacing="0" border="0" class="dataTable" id="example">
<thead>
<tr>
<th class="big-col">Rendering engine</th>
<th class="big-col">Browser</th>
<th class="big-col">Platform(s)</th>
<th class="big-col">Engine version</th>
<th class="big-col">CSS grade</th>
</tr>
</thead>
<tbody>
<tr>
<td>Trident</td>
<td>Internet
Explorer 4.0</td>
<td>Win 95+</td>
<td> 4</td>
<td>X</td>
</tr>
<tr>
<td>Trident</td>
<td>Internet
Explorer 5.0</td>
<td>Win 95+</td>
<td>5</td>
<td>C</td>
</tr>
<tr>
<td>Trident</td>
<td>Internet
Explorer 5.5</td>
<td>Win 95+</td>
<td>5.5</td>
<td>A</td>
</tr>
<tr>
<td>Trident</td>
<td>Internet
Explorer 6</td>
<td>Win 98+</td>
<td>6</td>
<td>A</td>
</tr>
<tr>
<td>Trident</td>
<td>Internet Explorer 7</td>
<td>Win XP SP2+</td>
<td>7</td>
<td>A</td>
</tr>
<tr>
<td>Trident</td>
<td>AOL browser (AOL desktop)</td>
<td>Win XP</td>
<td>6</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Firefox 1.0</td>
<td>Win 98+ / OSX.2+</td>
<td>1.7</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Firefox 1.5</td>
<td>Win 98+ / OSX.2+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Firefox 2.0</td>
<td>Win 98+ / OSX.2+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Firefox 3.0</td>
<td>Win 2k+ / OSX.3+</td>
<td>1.9</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Camino 1.0</td>
<td>OSX.2+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Camino 1.5</td>
<td>OSX.3+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Netscape 7.2</td>
<td>Win 95+ / Mac OS 8.6-9.2</td>
<td>1.7</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Netscape Browser 8</td>
<td>Win 98SE+</td>
<td>1.7</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Netscape Navigator 9</td>
<td>Win 98+ / OSX.2+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.0</td>
<td>Win 95+ / OSX.1+</td>
<td>1</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.1</td>
<td>Win 95+ / OSX.1+</td>
<td>1.1</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.2</td>
<td>Win 95+ / OSX.1+</td>
<td>1.2</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.3</td>
<td>Win 95+ / OSX.1+</td>
<td>1.3</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.4</td>
<td>Win 95+ / OSX.1+</td>
<td>1.4</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.5</td>
<td>Win 95+ / OSX.1+</td>
<td>1.5</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.6</td>
<td>Win 95+ / OSX.1+</td>
<td>1.6</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.7</td>
<td>Win 98+ / OSX.1+</td>
<td>1.7</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Mozilla 1.8</td>
<td>Win 98+ / OSX.1+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Seamonkey 1.1</td>
<td>Win 98+ / OSX.2+</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Gecko</td>
<td>Epiphany 2.20</td>
<td>Gnome</td>
<td>1.8</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>Safari 1.2</td>
<td>OSX.3</td>
<td>125.5</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>Safari 1.3</td>
<td>OSX.3</td>
<td>312.8</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>Safari 2.0</td>
<td>OSX.4+</td>
<td>419.3</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>Safari 3.0</td>
<td>OSX.4+</td>
<td>522.1</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>OmniWeb 5.5</td>
<td>OSX.4+</td>
<td>420</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>iPod Touch / iPhone</td>
<td>iPod</td>
<td>420.1</td>
<td>A</td>
</tr>
<tr>
<td>Webkit</td>
<td>S60</td>
<td>S60</td>
<td>413</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 7.0</td>
<td>Win 95+ / OSX.1+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 7.5</td>
<td>Win 95+ / OSX.2+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 8.0</td>
<td>Win 95+ / OSX.2+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 8.5</td>
<td>Win 95+ / OSX.2+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 9.0</td>
<td>Win 95+ / OSX.3+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 9.2</td>
<td>Win 88+ / OSX.3+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera 9.5</td>
<td>Win 88+ / OSX.3+</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Opera for Wii</td>
<td>Wii</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Nokia N800</td>
<td>N800</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Presto</td>
<td>Nintendo DS browser</td>
<td>Nintendo DS</td>
<td>8.5</td>
<td>C/A<sup>1</sup></td>
</tr>
<tr>
<td>KHTML</td>
<td>Konqureror 3.1</td>
<td>KDE 3.1</td>
<td>3.1</td>
<td>C</td>
</tr>
<tr>
<td>KHTML</td>
<td>Konqureror 3.3</td>
<td>KDE 3.3</td>
<td>3.3</td>
<td>A</td>
</tr>
<tr>
<td>KHTML</td>
<td>Konqureror 3.5</td>
<td>KDE 3.5</td>
<td>3.5</td>
<td>A</td>
</tr>
<tr>
<td>Tasman</td>
<td>Internet Explorer 4.5</td>
<td>Mac OS 8-9</td>
<td>-</td>
<td>X</td>
</tr>
<tr>
<td>Tasman</td>
<td>Internet Explorer 5.1</td>
<td>Mac OS 7.6-9</td>
<td>1</td>
<td>C</td>
</tr>
<tr>
<td>Tasman</td>
<td>Internet Explorer 5.2</td>
<td>Mac OS 8-X</td>
<td>1</td>
<td>C</td>
</tr>
<tr>
<td>Misc</td>
<td>NetFront 3.1</td>
<td>Embedded devices</td>
<td>-</td>
<td>C</td>
</tr>
<tr>
<td>Misc</td>
<td>NetFront 3.4</td>
<td>Embedded devices</td>
<td>-</td>
<td>A</td>
</tr>
<tr>
<td>Misc</td>
<td>Dillo 0.8</td>
<td>Embedded devices</td>
<td>-</td>
<td>X</td>
</tr>
<tr>
<td>Misc</td>
<td>Links</td>
<td>Text only</td>
<td>-</td>
<td>X</td>
</tr>
<tr>
<td>Misc</td>
<td>Lynx</td>
<td>Text only</td>
<td>-</td>
<td>X</td>
</tr>
<tr>
<td>Misc</td>
<td>IE Mobile</td>
<td>Windows Mobile 6</td>
<td>-</td>
<td>C</td>
</tr>
<tr>
<td>Misc</td>
<td>PSP browser</td>
<td>PSP</td>
<td>-</td>
<td>C</td>
</tr>
<tr>
<td>Other browsers</td>
<td>All others</td>
<td>-</td>
<td>-</td>
<td>U</td>
</tr>
</tbody>
</table>
</div>
</body>
另见： https://developer.mozilla.org/en-US/docs/Web/CSS/table-layout