Simple slim progress bars

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Slim progress bars for Ajax'y applications. Inspired by Google, YouTube, and Medium.


Add nprogress.js and nprogress.css to your project.
<script src='nprogress.js'></script>
<link rel='stylesheet' href='nprogress.css'/>

NProgress is available via bower and npm and spm.
$ bower install --save nprogress
$ npm install --save nprogress

Basic usage

Simply call start() and done() to control the progress bar.
~ js NProgress.start(); NProgress.done(); ~
Using Turbolinks or similar? Ensure you're using Turbolinks 1.3.0+, and use this: (explained
~ js $(document).on('page:fetch', function() { NProgress.start(); }); $(document).on('page:change', function() { NProgress.done(); }); $(document).on('page:restore', function() { NProgress.remove(); }); ~


Add progress to your Ajax calls! Bind it to the jQuery ajaxStart and ajaxStop events.
Make a fancy loading bar even without Turbolinks/Pjax! Bind it to $(document).ready and $(window).load.

Advanced usage

Percentages: To set a progress percentage, call .set(n), where n is a number between 0..1.
~ js NProgress.set(0.0); // Sorta same as .start() NProgress.set(0.4); NProgress.set(1.0); // Sorta same as .done() ~
Incrementing: To increment the progress bar, just use .inc(). This increments it with a random amount. This will never get to 100%: use it for every image load (or similar).
~ js; ~
If you want to increment by a specific value, you can pass that as a parameter:
~ js; // This will get the current status value and adds 0.2 until status is 0.994 ~
Force-done: By passing true to done(), it will show the progress bar even if it's not being shown. (The default behavior is that .done() will not
do anything if *.start()* isn't called)
~ js NProgress.done(true); ~
Get the status value: To get the status value, use .status



Changes the minimum percentage used upon starting. (default: 0.08)
~ js NProgress.configure({ minimum: 0.1 }); ~


You can change the markup using template. To keep the progress bar working, keep an element with role='bar' in there. See the default template for reference.
~ js NProgress.configure({ template: "
" });

easing and speed

Adjust animation settings using easing (a CSS easing string) and speed (in ms). (default: ease and 200)
~ js NProgress.configure({ easing: 'ease', speed: 500 }); ~


Turn of the automatic incrementing behavior by setting this to false. (default: true)
~ js NProgress.configure({ trickle: false }); ~

trickleRate and trickleSpeed

You can adjust the trickleRate (how much to increase per trickle) and trickleSpeed (how often to trickle, in ms).
~ js NProgress.configure({ trickleRate: 0.02, trickleSpeed: 800 }); ~


Turn off loading spinner by setting it to false. (default: true)
~ js NProgress.configure({ showSpinner: false }); ~


specify this to change the parent container. (default: body)
~ js NProgress.configure({ parent: '#container' }); ~


Just edit nprogress.css to your liking. Tip: you probably only want to find and replace occurrences of #29d.
The included CSS file is pretty minimal... in fact, feel free to scrap it and make your own!


New UI Pattern: Website Loading Bars (


Bugs and requests: submit them through the project's issues tracker.
Questions: ask them at StackOverflow with the tag nprogress.
Chat: join us at


NProgress © 2013-2014, Rico Sta. Cruz. Released under the MIT License.
Authored and maintained by Rico Sta. Cruz with help from contributors.  ·  GitHub @rstacruz  ·  Twitter @rstacruz

Status npm version spm package