How to detect horizontal scrolling in jQuery?

Question

How do I detect horizontal scrolling with jQuery?

This will get all scrolls:

$(window).scroll(function () {
    alert(\'in\');
});

Answer 1

This seems to work.

var lastScrollLeft = 0;
$(window).scroll(function() {
    var documentScrollLeft = $(document).scrollLeft();
    if (lastScrollLeft != documentScrollLeft) {
        console.log('scroll x');
        lastScrollLeft = documentScrollLeft;
    }
});

jsFiddle.

Answer 2

An update that shows direction left or right in a horizontal scroll based on code above:

var lastPos = 0;
$(window).scroll(function() {
    var currPos = $(document).scrollLeft();

    if (lastPos < currPos) {
        console.log('scroll right');
    } 
    if (lastPos > currPos) 
    {
        console.log('scroll left');
    }

    lastPos = currPos;
});

Test it at http://jsfiddle.net/EsPk7/7/

Answer 3

dunderwood's jsFiddle link didn't actually contain his code. I've forked his jsFiddle with what a mixture of what he posted here and what's on the jsFiddle:

var lastPos = 0;
$(window).scroll(function() {
    var currPos = $(document).scrollLeft();

    if (lastPos < currPos) {
        $('#current').html('Right');
    }
    if (lastPos > currPos) {
        $('#current').html('Left');
    }

    lastPos = currPos;
});

http://jsfiddle.net/kuVK8/

Answer 4

window.onresize = function() { 
    if ( $("div").outerWidth() < $("div").get(0).scrollWidth ) {
        console.log("foo bar scrollbar");
    } else {
        console.log(" no scrolling ");
    }
};