ScrollLogic
This project is based on zynga/scroller which was not maintained any longer. This repo does not have much in common with the original though. It's a radically stripped down and optimized version which serves only one purpose.
It's a pure logic component for one-axis decelerated scrolling, imitating the way mobile devices do native scrolling. No render loop, no zooming, no snapping, no paging. It only serves a single purpose: providing the most accurate and high-performance backbone for your scrolling needs. It does not seem very useful on it's own, but I needed exactly that for [enter project name as soon as it's public ;)]. Since scroll-logic does not contain any rendering loop, it does not do anything unless you request something from it (see getOffset below).
Usage
npm install scroll-logic for usage with browserify or use the window.ScrollLogic global.
//Only if you're using browserify.var ScrollLogic = ; var scrollLogic = //true by default. bouncing: false //0 by default, but that doesn't make much sense. containerLength: 800 contentLength: 23000; //Set the length of the container and the scrollable content in pixels.//ScrollLogic doesn't care if you do vertical or horizontal scrolling.scrollLogic;scrollLogic; //Get the scroll offset as integer.//Can be negative or larger than (contentLength - containerLength) if bouncing is enabled.//ScrollLogic doesn't do ANYTHING unless you query the offset. There's no animation loop or any computation going on.var offset = scrollLogic; //Stop any deceleration that may be "running" and jump to the new position.//The next `getOffset` call will return this position.scrollLogic; //Start a new interaction with the scrollable content.//Usually this would be called on `touchstart`.scrollLogic; //Once you've started a new interaction, you can add interactions.//Usually this would be called on `touchmove`.//This is a noop if there is no active interaction created using beginInteraction.scrollLogic; //Ends the current interaction. Usually this would be called on `touchend` or `touchcancel`.scrollLogic;