js實現動態進度條


<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>js實現動態進度條</title>
</head>
<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 進度條</h1>

<div id="myProgress">
  <div id="myBar"></div>
</div>

<br>
<button onclick="move()">點我</button> 

<script>
function move() {
  var elem = document.getElementById("myBar");   
  var width = 0;
  var id = setInterval(frame, 100);
  function frame() {
    if (width == 100) {
      clearInterval(id);
    } else {
      width++; 
      elem.style.width = width + '%'; 
    }
  }
}
</script>

</body>
</html>

 


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