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animation-bus
Advanced tools
Define different animation stops relative to another value.
yarn add animation-bus
npm install animation-bus --save
<script src="https://unpkg.com/animation-bus/dist/animation-bus.js"></script>
(UMD library exposed as `AnimationBus`)
import AnimationBus from 'animation-bus'
const scrollElements = document.querySelectorAll('[data-scroll-bus]')
const windowFactor = 0.5
const elementFactor = 0.5
let isTicking = false
let scrollTop, scrollBottom
// Define animation stops
const animations = [{
prop: 'backgroundColor',
stops: [
[-300, '#b4da55'],
[0, '#2ea8ff'],
[300, '#b4da55']
]
}, {
prop: 'scale',
stops: [
[-300, 0.25],
[0, 1],
[300, 0.25]
]
}, {
prop: 'opacity',
stops: [
[-300, 0],
[0, 1],
[300, 0]
]
}]
// Define animation stops
const origin = (element) => {
const windowOffset = window.innerHeight * windowFactor
const elementOffset = element.offsetHeight * elementFactor
return scrollTop + windowOffset - elementOffset - element.offsetTop
}
// Instantiate a new animation bus
const animationBus = new AnimationBus({ animations, origin })
// Listen for window scroll and apply transforms to elements
function scrollHandler() {
for (let i = 0; i < scrollElements.length; i++) {
animationBus.applyStyles(scrollElements[i])
}
isTicking = false
}
window.addEventListener('scroll', function () {
scrollTop = pageYOffset
if (!isTicking) {
window.requestAnimationFrame(scrollHandler)
}
isTicking = true
}, false);
Huge thank you to Darin Reid and all of his work on Flickity Transformer, as well as this amazing gist by Grégoire Piffault. Most of the code in here is heavily inspired by what these developers have previously done.
0.2.0
Constructor now accepts an options object rather than individual arguments
If only using with one element, you can pass it into the constructor
Animation object key now expects prop
instead of name
Animation object now allows colors to be passed as a range
FAQs
Define different animation stops relative to another value.
The npm package animation-bus receives a total of 18,989 weekly downloads. As such, animation-bus popularity was classified as popular.
We found that animation-bus demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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