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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>jQuery Selectors</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head> <body> <p class="demo">Paragraph 1</p> <p>Paragraph 2</p> <button id="btn">Highlight</button> <script> $("#btn").click(function(){ $(".demo").css("color", "blue"); }); </script> </body> </html>
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