Opposite of "scrollTop" in jQuery

Question

jQuery has a function called scrollTop which can be used to find the number of pixels hidden above the current page view.

I'm not really sure why, but there is no scrollBottom function which returns the number of pixels below the current page view.

Is there a jQuery plugin which adds this functionality? Or is it going to require some elaborate math with the window/document height and the scrollTop value?

Answer 1

You could make a pretty simple plugin for this:

$.fn.scrollBottom = function() {    return $(document).height() - this.scrollTop() - this.height();  }; 

Then call it on whatever element you wanted, for example:

$(window).scrollBottom();  //how many pixels below current view $("#elem").scrollBottom(); //how many pixels below element 

Answer 2

Perhaps this will help how to tell jquery to scroll to bottom, because there is really no opposite function. Same is the problem with scrollLeft - there is no scrollRight