CSS选择器仅适用于两个类，没有其他选择器
问题说明
我正在寻找某种CSS选择器，该选择器仅从仅具有这两个特定类的表中选择某些单元格，而没有其他选择.这是一个更加清晰的示例.
I am looking for some kind of CSS selector that will only select certain cells from a table that only have these two specific classes and nothing else. Here is an example for a bit more clarity.
因此在此表中，我想从行中选择单元格A和D进行样式设置，但是选择它们的唯一可区分方法是它们除了.abc和.xyz之外没有其他任何类.所以从本质上讲，我需要筛选出具有其他任何类(即.def，.ghi)的单元格.
So in this table i want to select cells A and D for styling from the row but the only distinguishable way to select them is that they don't have any classes other than .abc and .xyz. So essentially i need to fitler out any cells that have any other classes i.e. .def, .ghi.
<tr>
<td class="abc xyz">A</td>
<td class="abc xyz def">B</td>
<td class="abc xyz ghi">C</td>
<td class="abc xyz">D</td>
</tr>
现在我知道我可以使用not选择器来解决这个问题，但是这些类是从外部源注入到表中的，可以添加新的类，而我真的不想一直添加到不断增长的类列表中忽略.
Now i know i could go about it using the not selector but these classes are injected into table from an external source and new classes could be added and i don't really want to keep adding to an ever growing list of classes to ignore.
td.abc.xyz:not(.def),
td.abc.xyz:not(.ghi) {
/* Style to apply */
}
因此，如果有人可以将我的正确方向指向任何有帮助的地方，将不胜感激.
So if anyone could point me in the right direction to anything that could help, it would be greatly appreciated.
正确答案
您可以考虑属性选择器，但要注意空格和顺序:
You can consider attribute selector but pay attention to whitespaces and order:
[class="abc xyz"],
[class="xyz abc"] {
color:red;
}<table>
<tr>
<td class="abc xyz">A</td>
<td class="abc xyz def">B</td>
<td class="abc xyz ghi">C</td>
<td class="abc xyz">D</td>
<td class="xyz abc">D</td>
<td class="abc xyz ">this will fail</td>
</tr>
</table>如果可以添加一些JS，则可以使用 trim
If you can add some JS you can avoid the whitespace issue using trim
var td=document.querySelectorAll('td');
for(var i=0;i<td.length;i )
td[i].className=td[i].className.trim();[class="abc xyz"],
[class="xyz abc"] {
color:red;
}<table>
<tr>
<td class="abc xyz">A</td>
<td class="abc xyz def">B</td>
<td class="abc xyz ghi">C</td>
<td class="abc xyz">D</td>
<td class="xyz abc">D</td>
<td class="abc xyz ">this will be good</td>
</tr>
</table>这篇好文章是转载于：学新通技术网
