A function that animates an element’s scrollTop or scrollLeft position.
npm install scroll
var scroll = require('scroll')
var page = /Firefox/.test(navigator.userAgent) ?
document.documentElement :
document.body
// Basic usage
scroll.left(page, 200)
// Register a callback
scroll.top(page, 200, function (error, scrollTop) {
console.log(error)
// { 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 `error`.
})
// Specify an easing function (default: 'inOutSine')
scroll.left(page, 200, { ease: 'inBounce' })
// Specify a duration in milliseconds (default: 350) and register a callback.
scroll.left(page, 200, { duration: 1000 }, function (error, scrollLeft) {
})
// Cancel a scroll animation
var options = { ease: 'inBounce', duration: 1000 }
var cancel = scroll.top(page, 200, options, function (error, scrollTop) {
console.log(error.message)
// => Scroll cancelled
page.removeEventListener('wheel', cancel)
})
page.addEventListener('wheel', cancel)Note: The easing functions are those specified in component/ease.