How to make it so that when scrolling, the block that fits to the end of the browser window is fixed?

Question

JavaScript

The essence of the question is that the content is divided into two parts - vertical, one part is longer than the other,
how to make it so that when scrolling the page, one of the parts is fixed when it ends, or approaches the footer of the browser window itself, facebook example

Answer 1

leafo.net/sticky-kit

Answer 2

so far there is but very damp

jQuery(function($) {
  function fixDiv() {
    var $cache = $('#cont');
    if ($(window).scrollTop() >=  $(window).height())
      $cache.css({
    'position' : 'fixed',
    'top': 'auto',
    'bottom': 0,
    'left': 595,
    '-webkit-transform' : 'translateZ(0)',
      });
    else
      $cache.css({
    'position' : 'absolute',
    'top' : 0,
    'bottom' : 'auto',
    'left': 482,
      });
  }
  $(window).scroll(fixDiv);
  fixDiv();
});

Answer 3

as an option
https://github.com/garand/sticky