Various HTML tables display varying column widths even when utilizing the same colgroup settings

I'm facing an issue with multiple HTML tables on a single page, each following this structure:

H2 Header
Table
H2 Header
Table
H2 Header
Table

My requirement is to have all tables occupy 100% width, with columns set at widths of 50%, 30%, and 20%. I've applied the same CSS to each table for defining column widths. The tables are utilizing Twitter Bootstrap 3.0.0 from NuGet, with table and table-hover being Bootstrap classes.

However, upon loading the page, each table ends up with varying widths. This inconsistency persists despite having a CSS style in bootstrap.css specifying .table { width: 100% }. It seems that rather than applying the CSS rule, the table width is being determined by the content within its columns.

Am I overlooking something obvious here or making a mistake? Do I need to explicitly define the tables as 100% wide?

CSS

.columnA {
    width: 50%;
}

.columnB {
    width: 30%;
}

.columnC {
    width: 20%;
}

HTML

<!-- Repeated across several instances -->
<h2>Header</h2>
<table class="table table-hover">

    <colgroup>
        <col class="columnA" />
        <col class="columnB" />
        <col class="columnC" />
    </colgroup>

    <thead>
        <tr>
            <th>Title</th>
            <th>Address</th>
            <th>Description</th>
        <tr>
        <!-- Additional rows -->
    </thead>

    <tbody>
        <tr>
            <td>Site Title</td>
            <td>http://web-address.url</td>
            <td>A description of the site</td>
        <tr>
    </tbody>

</table>

Answer №1

Bootstrap alters the table structure to accommodate the content of all cells, resulting in a unique appearance for your tables.

Consider implementing the grid layout outlined in the bootstrap documentation for your tables

Explore Bootstrap Grid Layout Here

For instance,

Rather than specifying widths like this

<col class="columnA" />
<col class="columnB" />
<col class="columnC" />

You may opt for

<col class="col-md-6" />
<col class="col-md-4" />
<col class="col-md-2" />

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