Challenges encountered while using colspan in CSS tables

I'm looking to create a table layout where the first column appears twice as wide as the other two columns. However, when I use colspan=2 in the table, it doesn't have the desired effect.

Check out the code in action:

http://jsfiddle.net/US96B/

Here is the raw code snippet:

<div class="datagrid">
    <table>';
        <thead><tr><th colspan="2">header</th><th>header</th><th>header</th></tr></thead>
        <tfoot><tr><td colspan="4"><div id="no-paging">&nbsp;</div></tr></tfoot>
        <tbody>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td>data</td><td>data</td></tr>
        </tbody>
    </table>
</div>

Below you can see the corresponding CSS styles:

.datagrid table {
    border-collapse: collapse;
    text-align: left;
    width: 100%;
}
.datagrid {
    font: normal 12px/150% Arial, Helvetica, sans-serif;
    background: #fff;
    overflow: hidden;
    border: 1px solid #5492A2;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
}
.datagrid table td,
.datagrid table th {
    padding: 10px 0px;
}
.datagrid table thead th {
    background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #288096), color-stop(1, #288096) );
    background:-moz-linear-gradient( center top, #288096 5%, #288096 100% );
    filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#288096', endColorstr='#288096');
    background-color:#288096;
    color:#FFFFFF;
    font-size: 18px;
    font-weight: bold;
    border-left: 1px solid #0070A8;
}
.datagrid table thead th:first-child {
    border: none;
}
.datagrid table tbody td {
    color: #D4D2D2;
    border-left: 1px solid #D4D2D2;
    font-size: 16px;
    border-bottom: 1px solid #E1EEF4;
    font-weight: normal;
}
.datagrid table tbody td:first-child {
    border-left: none;
}
.datagrid table tbody tr:last-child td {
    border-bottom: none;
}
.datagrid table tfoot td div {
    border-top: 1px solid #5492A2;
    background: #FFFFFF;
}
.datagrid table tfoot td {
    padding: 0;
    font-size: 18px
}
.datagrid table tfoot td div {
    padding: 0px;
}
htmlcsshtml-table

Answer №1

The functionality is indeed working as expected. However, due to all of them utilizing colspan, it may not be immediately obvious.

Check out this demonstration in my fiddle that illustrates the effective use of colspan (the first row in tbody has been set to 4 columns without spans). To achieve a similar appearance to the first two rows combined, you can adjust the column widths accordingly like I did in my Fiddle (50% / 25% / 25%).

http://jsfiddle.net/doitlikejustin/US96B/4/

Answer №2

colspan is typically used to span a cell across multiple columns, not to specify the width of columns as you attempted in your code. Instead, you can set the width of each column individually. For example, you can set the width of the first column to 50% and the width of the other two columns to 25% each.

If you still wish to use colspan, you can do so by following this structure:

<div class="datagrid">
    <table>
        <thead>
            <tr>
                <th colspan="2" width="25%">header</th>
                <th width="25%"></th>
                <th>header</th>
                <th>header</th>
            </tr>
        </thead>
        <tbody>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
            <tr><td colspan="2">data</td><td></td><td>data</td><td>data</td></tr>
        </tbody>
    </table>
</div>

Answer №3

Have you considered setting width="50%" for the initial <th>, and width="25%" for the remaining two? There may be no necessity for using colspan at all.

Answer №4

Your fiddle has been successfully modified and is now functioning as expected.

SEE DEMO

.datagrid table thead th:first-child {
    border: none;
    width:50%;
}

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