javascript百分比進度條效果程式碼例項

螞蟻小編發表於2017-04-14
JavaScript

分享一段程式碼例項，它實現了百分比進度條效果。

程式碼例項如下:

[HTML] 純文字檢視 複製程式碼
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>螞蟻部落</title>
<style>
* {
  padding: 0;
  margin: 0;
}
#progressBox {
  width: 300px;
  height: 40px;
  border: 1px solid #c8c8c8;
  background: #fff;
  position: relative;
}
#progressBar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  height: 40px;
  width: 100%;
  line-height: 40px;
  color: #fff;
  text-align: center;
  font-size: 20px;
  font-weight: bold;
  clip: rect(0px,40px,40px,0);
  background: #00a1f5;
}
#progressText {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  width: 100%;
  height: 40px;
  line-height: 40px;
  color: #000;
  text-align: center;
  font-size: 20px;
  font-weight: bold;
}
</style>
<script>
window.onload = function() {
  var iNow = 0;
  var tiemr = setInterval(function() {
    if (iNow == 100) {
      clearInterval(tiemr)
    } else {
      iNow += 2;
      progressFn(iNow)
    }
  }, 30)

  function progressFn(cent) {
    var oDiv1 = document.getElementById('progressBox');
    var oDiv2 = document.getElementById('progressBar');
    var oDiv3 = document.getElementById('progressText');

    var allWidth = parseInt(getStyle(oDiv1, 'width'));

    oDiv2.innerHTML = cent + '%';
    oDiv3.innerHTML = cent + '%';
    oDiv2.style.clip = "rect(0px," + cent / 100 * allWidth + "px,40px,0)";

    function getStyle(obj, attr) {
      if (obj.currentStyle) {
        return obj.currentStyle[attr]
      } else {
        return getComputedStyle(obj, false)[attr]
      }
    }
  }
}
</script>
</head>
<body>
  <div id="progressBox">
    <div id="progressBar">0%</div>
    <div id="progressText">0%</div>
  </div>
</body>
</html>

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