javascript - Disable Predictive Scrolling - Mousewheel (OnScroll) Event fires too often (Touchpad) - JS -


i executing javascript onscroll. code works great normal computer mouse, when use notebooks touchpad, encounter following situation:

  • my mouse fires (about 1 8) mousewheel events while finger moving wheel.
  • my touchpad fires lot more (~60) mousewheel events while 2 fingers touching pad and continues fire after fingers in air again.

i know behavior mobile touch devices. feature called "predictive touch" - scrolling continues if finger movement had enough acceleration before lifting up.

i think touchpad drivers setting "smooth scrolling" behavior.

to debug case, have used following code:

/* handle mouse-wheel scrolling */ var lastchange = +new date(); $(window).bind('mousewheel',    function(e){     console.log("mw");     if(+new date() - lastchange > 1000){         console.log("mw allowed");         if(e.originalevent.wheeldelta > 0)  {/*go previous*/}         else{   /*go next*/}         lastchange = +new date();     } return false;});

this simple code "allows" mouse-scrolling-event every second.

if make fast touchpad-scroll, mousewheel event fired ~300 times. one-second-condition letting 3 events happen. fingers on touchpad far less second.

with test, discovered mousewheel events still fired (almost continuously 3 seconds), when fingers off touchpad.

is there javascript function or workaround / trick / hack avoid behavior?

something "ontouchend" event touchpads, maybe?

to achieve this, you'd have distinguish between mouse scroll events , touchpad events, not (yet) possible using javascript. asked in question how capture touch pad input.

pointer events in state of editor's draft , not yet supported browser. see touch events docs on mdn.


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