IE8 alternative to window.scrollY?

Question

I\'m trying to determine how many pixels down I\'ve scrolled using window.scrollY. But this isn\'t supported in IE8. What is the safe, cross-browser alternative

Answer 1

window.scrollY & window.scrollX works fine in all modern browers like (Chrome, FireFox & Safari) but does not work in IE so to fix the use window.pageXOffset or window.pageYOffset.

Here is a sample code I wrote to fix ie issue so that the programmatic scrolling works in all browsers including IE

if((window.scrollY || window.pageYOffset) >= 1100){
   //alert('Switch to land');
    $('#landTrst').trigger('click'); // your action goes here
}else if ((window.scrollY || window.pageYOffset) <= 900) {   
    //alert('Switch to Refernce Letter');
     $('#resLet').trigger('click'); // your action goes here
}                            

Answer 2

Based on Mozilla, and answers above, I have a created the functions below to more easily get the coords:

var windowEl = (function () {
    var isCSS1Compat = ((document.compatMode || "") === "CSS1Compat");
    function scroll() {
        return { left: scrollLeft, top: scrollTop };
    };
    function scrollLeft() {
        return window.scrollX || window.pageXOffset || (isCSS1Compat ? document.documentElement.scrollLeft : document.body.scrollLeft);
    };
    function scrollTop() {
        return window.scrollY || window.pageYOffset || (isCSS1Compat ? document.documentElement.scrollTop : document.body.scrollTop);
    };
    return {
        scroll: scroll,
        scrollLeft: scrollLeft,
        scrollTop: scrollTop
    }
})();

According to the Mozilla documentation, as cited by lifetimes above, the The pageXOffset property is an alias for the scrollX property, so is stictly speaking not necessary.

Anyhoo, usage is:

var scroll = windowEl.scroll();
// use scroll.left for the left scroll offset
// use scroll.top for the top scroll offset

var scrollLeft = windowEl.scrollLeft();
// the left scroll offset

var scrollTop = windowEl.scrollTop();
// the top scroll offset

Tested & works on Chrome, Firefox, Opera, Edge (8-Edge), IE (7-11), IE8 on XP