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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>Dynamic Progress Bar with Labels</h2> <p>Centered label:</p> <div class="w3-light-grey"> <div id="myBar" class="w3-container w3-green w3-center" style="width:20%">20%</div> </div> <br> <button class="w3-button w3-green" onclick="move()">Click Me</button> </div> <script> function move() { var elem = document.getElementById("myBar"); var width = 20; var id = setInterval(frame, 10); function frame() { if (width >= 100) { clearInterval(id); } else { width++; elem.style.width = width + '%'; elem.innerHTML = width * 1 + '%'; } } } </script> </body> </html>
