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electerious/scrollroot.js

Last active September 17, 2019 13:45
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Cross-browser scroll element fetching
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scrollroot.js
const scrollroot = (() => {
if ('scrollingElement' in document) return document.scrollingElement
const initial = document.documentElement.scrollTop
document.documentElement.scrollTop = initial + 1
const updated = document.documentElement.scrollTop
document.documentElement.scrollTop = initial
return (updated > initial ? document.documentElement : document.body)
})()
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Example:

scrollroot.scrollTop = 100

Description:

[…] Despite the specification being clear on it, browsers disagree on which element should handle the scroll position. Firefox and Edge use html, while Safari and Chrome consider body as the scrolling element. A new DOM API has been introduced to deal with this issue (document.scrollingElement) but we can’t rely on it yet as it’s not widely supported. […]

Source:

https://medium.com/@bdc/stripe-open-source-behind-the-scenes-59790999dea0

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