scroll-based HTMLElement property management

Installation

npm install data-scroll-animation

Usage

data-scroll-parent attribute

Specifies the start and end point of nested animation

data-scroll-top

Defines top offset in px

data-scroll-bottom

Defines bottom offset in px

The animation begins at start - topOffset and ends at end + bottomOffset

┌-------------------> topOffset     = frame 0
|
|
╔═════════════════╗-> start
║                 ║
║      PARENT     ║
║                 ║
╚═════════════════╝-> end
|
|
└-------------------> bottomOffset  = frame 1

data-scroll-(property)-(frame)="(value)"

Sets property of the attribute owner element to value at specified frame

property have format [property.]*property, so style.width works as well customProperty

value is linearly interpolated between frames special frames are "before" and "after"

data-scroll-(method)()

Calls method every frame with frame number as first and only argument method(frame: number): number

import * as ScrollAnimation from "data-scroll-animation";

ScrollAnimation.add(document.body); // adds all animation in the document
ScrollAnimation.add(document.querySelector("#animation")) // adds only the #animation element

ScrollAnimation.remove(document.querySelector("#element")) // removes only the #element element