#Détection du scroll vertical (haut / bas) #http://lehollandaisvolant.net/?mode=links&id=20160224192625 // 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; }