nanobar.js是一款轻量级的纯js进度条插件。这款进度条插件兼容ie8浏览器，它使用简朴，并提供一些 *** 来控制进度条的当前进度。 

安装nanobar.js

bower install nanobar
//or
npm install nanobar

js代码 

<script type="text/javascript" src="js/nanobar.js"></script>
<script type="text/javascript">
	var simplebar = new Nanobar();
	simplebar.go(50);
	var colorbar = new Nanobar({target: document.getElementById('color')});
	colorbar.go(50);
	var centeredbar = new Nanobar({target: document.getElementById('centered')});
	centeredbar.go(50);
</script>