Simple Scroll Progress Indicator For Long Pages – PageBar.js
A lightweight, dependency-free JavaScript library to create a visual indicator that shows how much of the page is left to scroll.
JavaScript & CSS scroll position
Lightweight Scroll Progress Bar In JavaScript – scrollProgress.js
The scrollProgress.js library allows you to create a scroll bar reflecting how far a user has scrolled down your webpage.
JavaScript Library To Detects If Elements Are In View – enter-view.js
enter-view.js is a pure JavaScript library that for the detection of HTML elements within the browser viewport.
Scroll Position Indicator In Vanilla JavaScript
A vanilla JS scroll position indicator that shows how far you have scrolled down the page.
Dynamic Reading Position Progress Bar – proBaws.js
A JavaScript library for drawing a dynamic reading position progress bar on the top of the page.
Maintain Scroll Position Of Scollable Content – scroll-stash
A small JavaScript library that saves the user’s scroll position in the local storage and automatically scrolls to the last scroll position on page reload or on the next visit.
Tiny ScrollSpy & Scroll Progress Indicator In JavaScript – Scroll Progress
A JavaScript scrollspy library that updates nav items to indicate on which content you’re viewing and displays how much content has been read in this content section.
Animated Top Progress Bar For Reading Progress – wavescrollbar
wavescrollbar is a standalone JavaScript library that creates an animated, striped top progress bar to indicate the reading time & scroll position in your document.
Track How Far You Are Scrolling – Scrolld
Yet another scroll position detection library which tracks how far a web page has been scrolled.
Slim Progressbar To Indicate How Far You Are Scrolling – sprogress.js
sprogress.js is a JavaScript library to generate a scroll position progress bar that indicates the reading progress of an article/post.