Is there a way to create a rule that functions like the following:
.container .unit:first-child(if it contains div.box1.extra) + .box2 { top: 50px;}
<div class="container">
<div class="unit">
<div class="box1 extra"><!-- content --></div>
</div>
<div class="unit">
<div class="box1"><!-- content --></div>
</div>
<div class="box2"><!-- content --></div>
</div>
Currently, CSS does not support DOM traversal. However, you can still declare a rule even if it cannot be achieved with CSS.
.container .unit:first-child .box1.extra + .box2 { top: 50px;}
If the .box2 element is not present, the layout will remain unchanged. But for units that contain a .box2, the style rule will be applied as expected.
NOTE: This method only works when .box2 is a child of .unit. If they are siblings, this approach is unfortunately not possible.
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