MDL提供了一系列CSS类来应用各种预定义的视觉和行为
增强功能，并显示不同类型的进度条.下表提到了可用的类及其效果.
| Sr.No. | Class Name&描述 |
|---|---|
| 1 | mdl-js-progress 将基本MDL行为设置为进度指示器并且是必需的类. |
| 2 | mdl-progress__indeterminate 将动画设置为进度指示器并且是可选类. |
以下示例将帮助您了解 mdl-js-progress
<html>
<head>
<script
src = "https://storage.googleapis.com/code.getmdl.io/1.0.6/material.min.js">
</script>
<link rel = "stylesheet"
href = "https://storage.googleapis.com/code.getmdl.io/1.0.6/material.indigo-pink.min.css">
<link rel = "stylesheet"
href = "https://fonts.googleapis.com/icon?family=Material+Icons">
</head>
<body>
<h4>Default Progress bar</h4>
<div id = "progressbar1" class = "mdl-progress mdl-js-progress"></div>
<h4>Indeterminate Progress bar</h4>
<div id = "progressbar2"
class = "mdl-progress mdl-js-progress mdl-progress__indeterminate"></div>
<h4>Buffering Progress bar</h4>
<div id = "progressbar3" class = "mdl-progress mdl-js-progress"></div>
<script language = "javascript">
document.querySelector('#progressbar1').addEventListener('mdl-componentupgraded',
function() {
this.MaterialProgress.setProgress(44);
});
document.querySelector('#progressbar3').addEventListener('mdl-componentupgraded',
function() {
this.MaterialProgress.setProgress(33);
this.MaterialProgress.setBuffer(87);
});
</script>
</body>
</html>验证结果.
