Question

How to detect was event called by script or by mousewheel?

For sample this code:

$(window).scroll(function(event){
// detecting here is scroll called by some script( $.scrollTo('#somediv') for sample ) or by mousewheel
});

Answer 1

I usually use an additional parameter and use it in my dynamic calls to that function.

$('.item').click(function(event,explicit) {
    if (explicit) console.log("I'm called explicitly!");
})

can be triggered like $('.item').trigger('click',true)