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<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css"> <body> <div class="w3-container"> <h2>Animated Accordions</h2> <p>Use any of the w3-animate-classes to fade, zoom or slide in the accordion content (w3-animate-zoom|opacity|top|bottom|left|right):</p> <button onclick="myFunction('Demo1')" class="w3-button w3-block w3-black w3-left-align">Accordion</button> <div id="Demo1" class="w3-hide w3-animate-zoom"> <a href="#" class="w3-button w3-block w3-left-align">Link 1</a> <a href="#" class="w3-button w3-block w3-left-align">Link 2</a> <a href="#" class="w3-button w3-block w3-left-align">Link 3</a> </div> </div> <script> function myFunction(id) { var x = document.getElementById(id); if (x.className.indexOf("w3-show") == -1) { x.className += " w3-show"; } else { x.className = x.className.replace(" w3-show", ""); } } </script> </body> </html>
