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animate-vanilla-js
Advanced tools
An vanilla js implementation of a function to animate an element
A tiny promise based animation function implemented in vanilla JavaScript.
yarn add animate-vanilla-js
import animate from 'animate-vanilla-js'
Download animate-vanilla-js-browser.js
from the latest release here: https://github.com/phegman/animate-vanilla-js/releases
<script type="text/javascript" src="animate-vanilla-js-browser.js"></script>
The animation function will then be usable via the global function animateVanillaJs()
Parameter | Type | Description | Options |
---|---|---|---|
from | number | Starting animation value | N/A |
to | number | Ending animation value | N/A |
duration | number | Animation duration | N/A |
easing | string || EasingFunction | Easing | linear , easeInQuad , easeOutQuad , easeInOutQuad , easeInCubic , easeOutCubic , easeInOutCubic , easeInQuart , easeOutQuart , easeInOutQuart , easeInQuint , easeOutQuint , easeInOutQuint |
update | Function | Function with animation value passed as parameter | N/A |
import animate from 'animate-vanilla-js'
animate(
0, // from
100, // to
500, // duration
'easeInOutQuad', // easing
value => {
// update function
console.log(value)
// Perform DOM manipulation
}
).then(() => {
console.log('Done animating')
})
import animate from 'animate-vanilla-js'
const promise = animate(
0, // from
100, // to
500, // duration
'easeInOutQuad', // easing
value => {
// update function
console.log(value)
// Perform DOM manipulation
}
)
document.addEventListener('keydown', event => {
event = event || window.event
// Escape key is pressed
if (event.keyCode === 27) {
promise.cancel()
}
})
promise.then(() => {
console.log('Done animating')
})
import animate from 'animate-vanilla-js'
animate(
0, // from
100, // to
500, // duration
(t, b, c, d) => (c * t) / d + b, // easing function
value => {
// update function
console.log(value)
// Perform DOM manipulation
}
).then(() => {
console.log('Done animating')
})
Parameter | Type | Description |
---|---|---|
t | number | Current time |
b | number | Beginning value |
c | number | Change in value |
d | number | Duration |
height: auto
const el = document.getElementById('el')
const toggleButton = document.getElementById('toggle-button')
toggleButton.addEventListener('click', () => {
if (el.classList.contains('open')) {
animate(el.scrollHeight, 0, 500, 'easeInOutQuad', value => {
el.style.height = `${value}px`
}).then(() => {
el.style.cssText = ''
el.classList.remove('open')
el.setAttribute('aria-hidden', 'true')
toggleButton.setAttribute('aria-expanded', 'false')
})
} else {
animate(0, el.scrollHeight, 500, 'easeInOutQuad', value => {
el.style.height = `${value}px`
}).then(() => {
el.style.cssText = ''
el.classList.add('open')
el.setAttribute('aria-hidden', 'false')
toggleButton.setAttribute('aria-expanded', 'true')
})
}
})
function addEventListenerMulti(
element: Element | NodeList,
listeners: string,
callback: (arg0: Event) => void
) {
function addListeners(el: Element) {
listeners
.split(' ')
.forEach(listener => el.addEventListener(listener, callback))
}
if (NodeList.prototype.isPrototypeOf(element)) {
;[...(<NodeList>element)].forEach(addListeners)
} else {
addListeners(<Element>element)
}
}
function removeEventListenerMulti(
element: Element | NodeList,
listeners: string,
callback: (arg0: Event) => void
) {
function removeListeners(el: Element) {
listeners
.split(' ')
.forEach(listener => el.removeEventListener(listener, callback))
}
if (NodeList.prototype.isPrototypeOf(element)) {
;[...(<NodeList>element)].forEach(removeListeners)
} else {
removeListeners(<Element>element)
}
}
const button = document.querySelector('.scroll-button')
const scrollAnchor = document.getElementById('scroll-anchor')
button.addEventListener('click', () => {
const currentScrollPosition =
(document.documentElement && document.documentElement.scrollTop) ||
document.body.scrollTop
const scrollAnchorTop =
scrollAnchor.getBoundingClientRect().top + currentScrollPosition
const promise = animate(
currentScrollPosition,
scrollAnchorTop,
500,
'easeInQuad',
value => {
window.scrollTo(0, value)
}
)
promise.then(() => {
// Try to focus on element
scrollAnchor.focus()
// If that element was not able to be focused, set tabindex and then refocus
if (document.activeElement !== scrollAnchor) {
scrollAnchor.tabIndex = -1
scrollAnchor.focus()
// We can hide the outline here because normally this element wouldn't be focusable.
// We made it focusable so the tab order could be set correctly
scrollAnchor.style.outline = 'none'
}
cancelScroll()
})
addEventListenerMulti(
document.querySelectorAll('html, body'),
'scroll mousedown wheel DOMMouseScroll mousewheel touchmove',
cancelScroll
)
function cancelScroll() {
promise.cancel()
removeEventListenerMulti(
document.querySelectorAll('html, body'),
'scroll mousedown wheel DOMMouseScroll mousewheel touchmove',
cancelScroll
)
}
})
IE / Edge | Firefox | Chrome | Safari | iOS Safari |
---|---|---|---|---|
IE11, > Edge 12 | > 23 | > 24 | > 6.1 | > 7.1 |
Start development server with hot module reloading
yarn serve
Build project for production
yarn build
FAQs
An vanilla js implementation of a function to animate an element
The npm package animate-vanilla-js receives a total of 3 weekly downloads. As such, animate-vanilla-js popularity was classified as not popular.
We found that animate-vanilla-js 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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