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<!DOCTYPE html> <html> <body> <p>单击按钮创建一个最大值为“100”、当前值为“22”的 PROGRESS 元素。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { var x = document.createElement("PROGRESS"); x.setAttribute("value", "22"); x.setAttribute("max", "100"); document.body.appendChild(x); } </script> </body> </html>