If a table header does not line up with the body, first check whether the rows represent the same number of logical columns. Count each cell’s colspan as multiple columns and account for rowspan; if those counts and the table’s declared column groups are consistent, investigate the rendered layout and CSS instead. Without the markup and styles, it is not possible to identify a particular cause.
Check whether the mismatch is structural or visual
“Width” can mean either the number of columns represented by the table structure or the visible width and alignment of the header. Start by simplifying the example to one <table> containing its <thead>, <tbody>, and any <colgroup>. Temporarily remove unrelated CSS if you can. This makes it easier to tell a column-count problem from a presentation problem.
For each row, add the logical columns represented by its cells. A cell without a colspan represents one column; a cell with colspan="3" represents three. In a multi-row header, also account for cells extended into other rows by rowspan. The HTML Standard defines these spans and says, “These attributes must not be used to overlap cells.” WHATWG HTML Standard: attributes common to td and th elements.
Make the header and body represent the same columns
Compare every header row with the body rows it labels. A grouped heading is not an extra column: it spans the columns beneath it. Encode that intent with colspan rather than adding an empty or misleading header cell. Check that the combined declared span of any column groups matches the table’s total columns, as described in the W3C WAI tutorial for tables with irregular headers.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
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Simple, one-row header
For a straightforward table, use one column header for each logical column and mark it with scope="col":
<table>
<thead>
<tr>
<th scope="col">Name</th>
<th scope="col">Role</th>
<th scope="col">Location</th>
</tr>
</thead>
<tbody>
<tr>
<td>Ari</td>
<td>Editor</td>
<td>Remote</td>
</tr>
</tbody>
</table>Grouped or multi-level header
If one heading genuinely labels several columns, give it a span equal to the number of columns in that group. For irregular, multi-level headers, use column groups where appropriate and mark the group header with scope="colgroup"; mark its leaf headers with scope="col". WAI’s irregular-header example demonstrates this approach.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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Verify header semantics, not just appearance
Use <th> for actual header cells and <td> for data cells. A table that looks aligned can still lack clear associations between headings and data. For ordinary column headers, scope="col" can identify the relationship. In more complex tables, use explicit header IDs and headers references where needed. See the W3C WAI tables tutorial and MDN’s table accessibility guide.
If the counts match, inspect the rendered layout
When the logical structure checks out, look at the computed widths and table layout in the browser’s developer tools. Confirm that the header and body are parts of the same table; separate tables can render with different column widths even when their contents appear related. Inspect the CSS affecting the table, rows, and cells, then compare the rendered header and body. The query alone does not establish which styling rule, if any, is responsible, so there is no universal CSS change to prescribe without the actual markup and styles.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
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- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
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Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
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