Scrollama – Scrollytelling with IntersectionObserver

Scrollama is a modern & lightweight JavaScript library for scrollytelling using IntersectionObserver in favor of scroll events.

The code that accompanies the markup pictured above:

// instantiate the scrollama
const scroller = scrollama();

// setup the instance, pass callback functions
    container: '.scroll', // wrapping container
    step: '.scroll__text .step', // all steps
    graphic: '.scroll__graphic', // the sticky element
    offset: 0.5, // optional, default = 0.5

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