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<!DOCTYPE html>
<html>
<head>
<style>
h1 {
  color: red;
  font-size: 50px;
}
</style>
<script>
function myFunction() {
  var s = document.styleSheets[0].rules[0].style;
  var ruleObj = s.parentRule;
  document.getElementById("demo").innerHTML = ruleObj.cssText;
}
</script> 
</head>
<body>
<h1>The parentRule Property</h1>
<p>The parentRule property returns a CSSRule Object that represent the CSS rule for the specified style declaration.</p>
<button onclick="myFunction()">Display the CSS Rule</button>
<p id="demo"></p>
</body>
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_cssstyle_parentrule by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 05 Sep 2022 15:39:33 GMT -->
</html>