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CSSStyleDeclaration parentRule 属性
tryjsref_cssstyle_parentrule
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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> </html>