I guess
body.scrollTop
is deprecated in strict mode. Please use documentElement.scrollTop
if in strict mode and body.scrollTop
only if in quirks mode.
So I would suggest you to use document.documentElement.scrollTop
. also let us know when are you using this statement? show us full code and your console error if possible
Please try the below code edited with respect to your comment code and let us know what you see in console.
jQuery(document).ready(function ($) {
jQuery(window).scroll(function(){
var ScrollTop = jQuery(window).scrollTop();
if (ScrollTop > 100) {
jQuery( ".site-header" ).addClass( "scroll" );
console.log("above 100");
}else{
jQuery( ".site-header" ).removeClass( "scroll" );
console.log("below or equal to 100");
}
});
});