Hi
I must be wrong, because its surely a basic feature, but it seems that it
is not possible to define a selector which matches elements which *dont*
have a particular attribute.
I am taking HTML which contains alignment attributes on table cells where
the originating software considers this appropriate, e.g.
<table>
<caption>This is a table</caption>
<tr>
<th align="center">heading</th>
<th>heading</th>
</tr>
<tr>
<td align="center">data</td>
<td>data</td>
</tr>
<tr>
<td>data</td>
<td align="right">data</td>
</tr>
</table>
The alignment attributes are generated with the assumption that all table
cells and headings are left-aligned by default, but this leads to an issue
with the default behaviour of IE (which is to left-align <td> elements, but
center <th> elements).
So I want to style this with something like
tr[^align], th[^align] {
text-align: left;
}
tr[align], th[align] {
text-align: attr(align);
}
where the [^align] piece means select elements which do NOT have an align
attribute. There doesn't seem to be such a construct in CSS.
Two and a half questions:
1. Is there a construct which I can use for an undefined attribute?
2. Is it valid to define text-align: attr(align) as in the code above? All
the examples I have seen restrict the use of attr() to defining "content:".
The half question:
a. If the answer to both the foregoing is No, how would you recommend coding
this requirement in CSS?
Cheers
T
Trevor Nicholls
Casting the Void
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