<h3>以下实例演示了如何访问 PROGRESS 元素</h3> 下载进度条 <progress id="myProgress" value="75" max="100"> </progress> <p>点击按钮获取当前进度条值(下载进度) 。</p> <p id="demo"></p> <button onclick="myFunction()">点我</button> <script> function myFunction() { var x = document.getElementById("myProgress").value; document.getElementById("demo").innerHTML = x; } </script>