Codelab Editor
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <title>fadeTo() — Callback</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style> body { font-family: Arial; padding:20px; } .box { width:150px; height:100px; background:#3f51b5; color:#fff; display:flex; align-items:center; justify-content:center; margin-bottom:10px; } button { padding:8px 12px; background:#007acc; color:#fff; border:none; border-radius:4px; cursor:pointer; } </style> </head> <body> <h2>fadeTo() — Callback</h2> <p>Alerts when opacity reaches 30%.</p> <div class="box" id="box15" style="opacity:1;">Fade to 30%</div> <button id="btn15">Fade To</button> <script> $('#btn15').click(function(){ $('#box15').fadeTo(400,0.3,function(){ alert('Opacity now at 30%'); }); }); </script> </body> </html>
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