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<!DOCTYPE html>
<html>
<style>
#myProgress {
  width: 100%;
  background-color: #ddd;
}
#myBar {
  width: 1%;
  height: 30px;
  background-color: #04AA6D;
}
</style>
<body>
<h1>JavaScript Progress Bar</h1>
<div id="myProgress">
  <div id="myBar"></div>
</div>
<br>
<button onclick="move()">Click Me</button> 
<script>
var i = 0;
function move() {
  if (i == 0) {
    i = 1;
    var elem = document.getElementById("myBar");
    var width = 1;
    var id = setInterval(frame, 10);
    function frame() {
      if (width >= 100) {
        clearInterval(id);
        i = 0;
      } else {
        width++;
        elem.style.width = width + "%";
      }
    }
  }
}
</script>
</body>