CodePen

HTML

            
              <ul>
  <li>I'm all alone!</li>
</ul>  

<ul>
  <li>We are together.</li>
  <li>We are together.</li>
  <li>We are together.</li>
</ul>  
            
          
!
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CSS

            
              ul {
  border: 1px solid #ccc;
  margin: 20px;
  padding: 10px 10px 10px 30px;
}

li:only-of-type {
  color: red;
}
            
          
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JS

            
              
            
          
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