scroll events based on an interval

onScrollOnInterval.js

if (document.getElementById('widget-slide-dock'))
{
	var didScroll = false
	,	randomPost = document.getElementById('widget-slide-dock')
	,	triggerElement = document.getElementById('site-sidebar')
	,	targetPosition = (triggerElement.offsetHeight + jQuery(triggerElement).offset().top);

	setInterval( function()
	{
		if(didScroll)
		{
			didScroll = false;
		}
	}, 100);

	window.onresize = function()
	{
		var targetPosition = (triggerElement.offsetHeight + jQuery(triggerElement).offset().top);
	}

	window.onscroll = function()
	{
		didScroll = true;
		if ( ((window.pageYOffset + window.innerHeight) - randomPost.offsetHeight) >= targetPosition )
		{
			randomPost.classList.add('slide-dock-on');
		}
		else
		{
			randomPost.classList.remove('slide-dock-on');
		}
	}
}