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<!DOCTYPE html> <html> <head> <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script> <style> body { font-family: sans-serif; padding: 20px; background: #f8fafc; } .demo-area { background: white; padding: 20px; border: 1px solid #cbd5e1; border-radius: 8px; margin-bottom: 15px; } .sorot { background-color: #fca311 !important; color: #0d2e5c !important; font-weight: bold; padding: 3px 6px; border-radius: 4px; } button { background: #00758f; color: white; border: none; padding: 8px 14px; border-radius: 6px; cursor: pointer; margin: 4px; } </style> </head> <body> <h3>Laboratorium Selektor jQuery</h3> <div class="demo-area"> <h4 id="judulUtama">Judul Halaman (#judulUtama)</h4> <p class="paragraf-info">Paragraf 1 (.paragraf-info)</p> <p class="paragraf-info">Paragraf 2 (.paragraf-info)</p> <p>Paragraf Biasa Tanpa Kelas</p> </div> <div> <button id="btnSemua">Pilih Semua ('*')</button> <button id="btnId">Pilih ID ('#judulUtama')</button> <button id="btnKelas">Pilih Kelas ('.paragraf-info')</button> <button id="btnReset" style="background:#64748b;">Bersihkan</button> </div> <script> $(document).ready(function() { function clear() { $('.demo-area *').removeClass('sorot'); } $('#btnSemua').click(function() { clear(); $('.demo-area *').addClass('sorot'); }); $('#btnId').click(function() { clear(); $('#judulUtama').addClass('sorot'); }); $('#btnKelas').click(function() { clear(); $('.paragraf-info').addClass('sorot'); }); $('#btnReset').click(function() { clear(); }); }); </script> </body> </html>
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