animates the scroll top/left position of an element
note: you may need to polyfill requestAnimationFrame in older browsers
npm install scrollvar scroll = require('scroll')
var page = require('scroll-doc')()
var ease = require('ease-component')
// Basic usage
scroll.left(page, 200)
// Register a callback
scroll.top(page, 200, function (err, scrollTop) {
console.log(err)
// { message: "Scroll cancelled" } or
// { message: "Element already at target scroll position" } or
// null
console.log(scrollTop)
// => The new scrollTop position of the element
// This is always returned, even when there’s an `err`.
})
// Specify a custom easing function
scroll.left(page, 200, { ease: ease.inBounce })
// Specify a duration in milliseconds (default: 350) and register a callback.
scroll.left(page, 200, { duration: 1000 }, function (err, scrollLeft) {
})
// Cancel a scroll animation
var options = { duration: 1000 }
var cancel = scroll.top(page, 200, options, function (err, scrollTop) {
console.log(err.message)
// => Scroll cancelled
page.removeEventListener('wheel', cancel)
})
page.addEventListener('wheel', cancel)note: the default easing is inOutSine from component/ease.