[JavaScript] detect down/up scrolling - Le Hollandais Volant
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// Initial state
var scrollPos = 0;
// adding scroll event
window.addEventListener('scroll', function(){ scrolling() });
// the function : compares the "new" scrolling state with the previous
// (this allows detecting either "up" or "down" scrolling)
// then saves the new in the $previous for the next iteration.
function scrolling() {
if ((document.body.getBoundingClientRect()).top > scrollPos) {
console.log('scrolling DOWN');
} else {
console.log('scrolling UP');
}
scrollPos = (document.body.getBoundingClientRect()).top;
}
Wed Feb 24 23:07:05 2016
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