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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Attr CSS Class</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style>.highlight{background:yellow;}</style> </head> <body> <a id="link" href="#">Link</a> <div id="box">Box</div> <button id="btn">Change</button> <script> $("#btn").click(function(){ $("#link").attr("href", "https://codingwithsonu.com"); $("#box").css({"color":"#333","background":"#f7f7f7"}).addClass("highlight"); }); </script> </body> </html>
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