How can I select the last and deepest element in CSS?
Is there a way to improve this css code?
What solution do you proposed for a deep tree? (~15-25).
I'm avoiding using javascript. But SASS solutions are welcome.(maybe using @for?)
/*level 1*/ div.case > ul:last-child > li.leaf:last-child > div { font-weight: bold; background: red; } /*level 2*/ div.case > ul:last-child > li.expanded:last-child > ul > li.leaf:last-child { font-weight: bold; background: blue; } /*level 3*/ div.case > ul:last-child > li.expanded:last-child > ul > li.expanded:last-child > ul > li.leaf:last-child { font-weight: bold; background: green; } /*level 4*/ div.case > ul:last-child > li.expanded:last-child > ul > li.expanded:last-child > ul > li.expanded:last-child > ul > li.leaf:last-child { font-weight: bold; background: yellow; }
<div class="case"> <h1>Case 0</h1> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> <li class="expanded"> <div>2. content</div> <ul> <li class="leaf"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> </ul> </li> <li class="leaf"> <div>3. content (bold)</div> </li> </ul> </div> <div class="case"> <h1>Case 1</h1> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> <li class="expanded"> <div>2. content</div> <ul> <li class="leaf"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> </ul> </li> <li class="expanded"> <div>3. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> <li class="leaf"> <div>3. content (bold)</div> </li> </ul> </li> </ul> </div> <div class="case"> <h1>Case 2</h1> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> <li class="leaf"> <div>2. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> <li class="leaf"> <div>3. content</div> </li> </ul> </li> <li class="expanded"> <div>3. content</div> <ul> <li class="expanded"> <div>1. content a</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content (bold)</div> </li> </ul> </li> </ul> </li> </ul> </div> <div class="case"> <h1>Case 3</h1> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> <li class="expanded"> <div>2. content</div> <ul> <li class="leaf"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> </ul> </li> <li class="expanded"> <div>3. content</div> <ul> <li class="expanded"> <div>2. content</div> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content (bold)</div> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </div> <div class="case"> <h1>Case 4</h1> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> <li class="expanded"> <div>2. content</div> <ul> <li class="expanded"> <div>2. content</div> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content</div> </li> </ul> </li> </ul> </li> </ul> </li> <li class="expanded"> <div>3. content</div> <ul> <li class="expanded"> <div>1. content</div> <ul> <li class="leaf"> <div>1. content</div> </li> <li class="leaf"> <div>2. content(bold)</div> </li> </ul> </li> </ul> </li> </ul> </div> <div class="case"> <h1>Case 5</h1> <ul> <li class="leaf"> <div>content 1</div> </li> <li class="leaf"> <div>content 2</div> </li> <li class="leaf"> <div>content 3(bold)</div> </li> </ul> </div>
If I understand your question correctly, you want to target the last li
tag in multiple ul
s, where the number of nesting levels in the ul
s is unpredictable.
You want a selector that targets the "last and deepest element" in a containing block where the number of elements preceding it in the block are unknown and irrelevant.
This doesn't appear to be possible with Selectors 2.1 or Selectors 3 .
The :last-child
, :last-of-type
and nth-child
pseudo-classes work when the nesting levels are fixed. In a dynamic environment where there are multiple lists of varying nesting levels these selector rules will break.
This will select the last li
in the first level ul
:
div.case > ul > li:last-child
This will select the last li
in the second level ul
:
div.case > ul > li:last-child > ul > li:last-child
This will select the last li
in the third level ul
:
div.case > ul > li:last-child > ul > li:last-child > ul > li:last-child
and so on...
A solution, however, may exist in Selectors 4 , which browsers haven't yet implemented:
li:last-child:not(:has(> li))
This rule targets last child li
s that have no descendant li
s, which matches your requirement.
For now, however, if you know the nesting level for each of your ul
containers you can apply a class to each targeted li
.
Thanks @BoltClock for help crafting the Selectors 4 rule (see comments).
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