What is the best cross-browser way to detect the scrollTop of the browser window? I prefer not to use any pre-built code libraries because this is a very simple script, and
I've been using window.scrollY || document.documentElement.scrollTop.
window.scrollY || document.documentElement.scrollTop
window.scrollY covers all browsers except IEs. document.documentElement.scrollTop covers IE.
window.scrollY
document.documentElement.scrollTop