如何设置DataTables的列宽

Question

我想为所有 DataTables（使用滚动插件）列设置静态宽度。

如果我为除一个之外的所有 <th> 标签设置宽度，它会使列变宽。如果为所有标签都设置了宽度，它也不起作用。另外，当我通过开发人员工具进行检查时，我没有看到任何 <th> 宽度为 400px 的元素。元素具有不同的宽度：115px、132px、145px ...

这是为什么？如何设置列的确切宽度？

CSS

.big-col {
  width: 400px;
}

JS

var options = {
    "sScrollX": "100%",
    "sScrollXInner": "110%",
    "bScrollCollapse": true,
    "colReorder": true
};

$(document).ready(function() {
    $('#example').dataTable(options);
});

完整示例：http://fiddle.jshell.net/sergibondarenko/o1hoabep/8/

此外，我尝试了 columnDefs 选项，但没有成功。

 var options = {
    "columnDefs": [
      { "width": "100px", "targets": "_all" }
    ]
 };

确切的列数未知。 HTML table 是根据服务器端的数据动态构建的。

Answer 1

th.big-col{
width:400px !important;
}

table#example{
table-layout:fixed;
}

宽度的 !important 是覆盖 datatables 应用的任何内联样式所必需的，并且可能还有 jsfiddle 或其他应用的其他样式。 table-layout:fixed; 将使 table 渲染器优先考虑第一行中单元格的宽度，以决定每列中所有单元格的宽度。

更新：fiddle 似乎已关闭，所以这是一个代码片段：

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>

另请参阅： https://developer.mozilla.org/en-US/docs/Web/CSS/table-layout

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