@lagrange/animator/src/Constants.js

This library helps making parallax animations on scroll. It is built with performance in mind, as it doesn't need to relayout or paint to operate.

export const ELEM_BOTTOM = 'eb';
export const ELEM_TOP = 'et';
export const ELEM_CENTER = 'ec';

export const SCREEN_BOTTOM = 'sb';
export const SCREEN_TOP = 'st';
export const SCREEN_CENTER = 'sc';