NProgress.js
A progress bar with realistic trickle animations
NProgress.js is a nanoscopic progress bar. Featuring realistic trickle animations to convince your users that something is happening! For Ajax'y applications. Inspired by Google, YouTube, and Medium. Fully customizable animations, percentage and progress settings. Add progress to your Ajax calls and make a fancy loading bar even without Turbolinks/Pjax. Create a loading bar, set a percentage, increment it as much as you like, make it complete the progress and customize it.