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<!DOCTYPE html>
<html>
<head>
<style>
.siblings * { 
  display: block;
  border: 2px solid lightgrey;
  color: lightgrey;
  padding: 5px;
  margin: 15px;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("li.start").prevAll(".first").css({"color": "red", "border": "2px solid red"});
});
</script>
</head>
<body>
<div style="width:500px;" class="siblings">
  <ul>ul (parent)  
    <li class="first">li (the previous sibling of li with class name "start")</li>
    <li>li (the previous sibling of li with class name "start")</li>
    <li class="first">li (the previous sibling of li with class name "start")</li>
    <li class="start">li (sibling with class name "start")</li>
    <li>li (sibling)</li>
    <li>li (sibling)</li>
  </ul>   
</div>
<p>In this example, we narrow down the search result by only returning elements with class name "first", that are previous siblings of the li element with class name "start".</p>
</body>
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</html>