JSFiddle - React, Tailwind, and code Playground

HTML

<div class="d3-d10">
<div class="article_header">
	<h1>{{ title }}</h1>
		<ul class="center">
			<li><a href="/profile/{{ username }}" class="user_avatar">{{ gravatamatic:quicky
				email = "{email}"
				size  = "32"
				}}</a></li>
			<li><a href="/profile/{{ username }}">{{ username }}</a> on {{ current_date format="M jS, Y" }}</li>
		</ul>
	</div>
</div>
<div class="d3-d10 article_content">
	Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborumLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum
    
    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum
    
    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure...

CSS

h1{
	text-align: center;
	font-size: 3em;
	margin-top: 24px;
	margin-bottom: 8px;
}
div.article_content{
	overflow: hidden;
}

div.article_content img{
	margin-top: 32px;
	margin-bottom: 32px;
}

div.article_header{
	margin-bottom: 40px;
}

div.article_header ul li a{
	color: $digest-red;
	font-weight: 700;
}

div.article_block_element{
	margin-bottom: 24px;
}

div.source_link{
	margin-top: 64px;
}

div.source_link p{
	font-style: italic;
}

div.author_section{
	border-top: 1px solid $digest-greyMedium;
	padding-top: 24px;
	margin-bottom: 40px;
}

div.author_section ul li{
	display: block;
}

div.article_block_element span.icon-emblem{
	font-size: 2.5em;
	text-align: center;
	display: block;
	margin-top: 32px;
	color: $digest-greyMedium;
}

div.author_section ul li{
	margin-bottom: 16px;
}

div.comments{
	margin-top: 40px;
}

/* Article footer */

div.article_footer{
	height: 56px;
	background-color: white;
	border-top: 1px solid $digest-greyMedium;
	position: fixed;
	padding-top: 16px;
	padding-left: 1%;
	padding-right: 1%;
	bottom: 0;
	width: 98%;
	z-index: 9999;
}

JavaScript

/**
* Article more dropdown
*/
$('.article_footer').show();

var entryheight = $('.article_footer_base').offset().top;

$(document).scroll(function () {
    var y = $(window).scrollTop() + $(window).height();
    if (y > entryheight) {
         $('.article_footer').fadeOut();
    } else {
        $('.article_footer').fadeIn();
    }
});