如何区分滚动事件和长按事件？

Question

Problem :

SomeDomElement.addEventListener('touchstart', function preventLongPress(event) {
              
                  if (event.touches.length >=1) event.preventDefault();
                }, false);

If I use : if (event.touches.length >=1) event.preventDefault(); then this prevents long press event but also disables the scroll event.

There is no touchmove or touchend events for long press.

What I desired :

prevent long press but don't prevent scrolling

N ote : I am using vanilla Javascript only , no jQuery

Answer 1

Hope this will help you.

document.addEventListener("touchstart", function(){
    detectTap = false;
});
document.addEventListener("touchmove", function(){
    detectTap = true;
});
document.addEventListener("touchend", function(){
    if(detectTap)
        alert("scrolled"); /* here add whatever functionality you wants */
    else 
        alert("long pressed"); /* here add whatever functionality you wants */
});