JavaScript used to add Readmore.js to a Story Map Tour https://medium.com/developing-a-story-map/showcase-your-photos-in-map-tour-with-readmore-js-6f004d5d612#.cpifuoat2

blogs_2015_readmorejs.html

<script type="text/javascript">
	// Get the full url to the app so we can load the readmore.js file
	var path = location.pathname.replace(/\/[^/]+$/, '/');
	// require Readmore.js and app events
	require(["dojo/topic", path + "app/readmore.min.js"], function(topic) {
		// After each point change, call readmore on the description pane
		topic.subscribe("maptour-point-change-after", function(){
				$('.description').readmore({
					collapsedHeight: 10,
					blockCSS: 'float: left; padding: 10px;'
				});
		});
	});
</script>