代码示例：（标识：jsck_win_setinterval_progressbar）
<!DOCTYPE html>
<html>
<style>
#myProgress {
width: 100%;
height: 30px;
position: relative;
background-color: #ddd;
}
#myBar {
background-color: #4CAF50;
width: 10px;
height: 30px;
position: absolute;
}
</style>
<body>
<h1>JavaScript 进度条</h1>
<div id="myProgress">
<div id="myBar"></div>
</div>
<br>
<button onclick="move()">点击我</button>
<script>
function move() {
const element = document.getElementById("myBar");
let width = 0;
const id = setInterval(frame, 10);
function frame() {
if (width == 100) {
clearInterval(id);
} else {
width++;
element.style.width = width + '%';
}
}
}
</script>
</body>
</html>
