No blank row
{| class="wikitable" style="text-align:center"
|-
| colspan="12" | colspan 12
|-
| colspan="3" | colspan 3 1
| colspan="3" | colspan 3 2
| colspan="3" | colspan 3 3
| colspan="3" | colspan 3 4
|-
| colspan="4" | colspan 4 1
| colspan="4" | colspan 4 2
| colspan="4" | colspan 4 3
|}
| colspan 12
|
| colspan 3 1
|
colspan 3 2
|
colspan 3 3
|
colspan 3 4
|
| colspan 4 1
|
colspan 4 2
|
colspan 4 3
|
Looks like
on latest browsers looks no different to
{| class="wikitable" style="text-align:center"
|-
| colspan="4" | colspan 4
|-
| nospan 1
| nospan 2
| nospan 3
| nospan 4
|-
| colspan="2" | colspan 2
| nospan 1
| nospan 2
|}
| colspan 4
|
| nospan 1
|
nospan 2
|
nospan 3
|
nospan 4
|
| colspan 2
|
nospan 1
|
nospan 2
|
Row of blank cells
trying to work around by using a row of blank cells...
{| class="wikitable" style="text-align:center"
|-
| colspan="12" | colspan 12
|-
| colspan="3" | colspan 3 1
| colspan="3" | colspan 3 2
| colspan="3" | colspan 3 3
| colspan="3" | colspan 3 4
|-
| colspan="4" | colspan 4 1
| colspan="4" | colspan 4 2
| colspan="4" | colspan 4 3
|-
| || || || || || || || || || ||
|}
| colspan 12
|
| colspan 3 1
|
colspan 3 2
|
colspan 3 3
|
colspan 3 4
|
| colspan 4 1
|
colspan 4 2
|
colspan 4 3
|
|
|
|
|
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|
Row of collapsed blank cells
and then try to hide them...
{| class="wikitable" style="text-align:center"
|-
| colspan="12" | colspan 12
|-
| colspan="3" | colspan 3 1
| colspan="3" | colspan 3 2
| colspan="3" | colspan 3 3
| colspan="3" | colspan 3 4
|-
| colspan="4" | colspan 4 1
| colspan="4" | colspan 4 2
| colspan="4" | colspan 4 3
|- style="visibility:collapse"
| || || || || || || || || || ||
|}
| colspan 12
|
| colspan 3 1
|
colspan 3 2
|
colspan 3 3
|
colspan 3 4
|
| colspan 4 1
|
colspan 4 2
|
colspan 4 3
|
|
|
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|
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