How to Build a Page Scroll Progress Indicator With jQuery and SVG | Envato Tuts+

Today we will be looking at a few techniques we can use to show scroll progress for users who are reading a page. This technique is being used on an increasing number of sites, and for good reason; it provides a contextual understanding of investment needed to consume a particular page. As the user scrolls, they are presented with a sense of current progress in different formats. As seen on ia.net