网页顶部加载进度条NProgress

<script src='nprogress.js'></script>
<link rel='stylesheet' href='nprogress.css'/>

$ bower install --save nprogress
$ npm install --save nprogress

NProgress.start();
NProgress.done();

$(document).on('page:fetch',   function() { NProgress.start(); });
$(document).on('page:change',  function() { NProgress.done(); });
$(document).on('page:restore', function() { NProgress.remove(); });