JS function: check if element can have child nodes, i.e. does it have an end tag? Source: http://stackoverflow.com/a/16130626/552067

can-have-children.js

// check if element can have child nodes
var canHaveChildren = (function() {
	var noChildren = {
		input: 1,
		meta: 1,
		br: 1,
		link: 1,
		img: 1,
		hr: 1,
		area: 1,
		base: 1,
		col: 1,
		param: 1,
		wbr: 1,
		track: 1,
		source: 1,
		embed: 1,
		command: 1,
		keygen: 1
	};

	return function canHaveChildren(tagName) {
		tagName = tagName.toLowerCase();
		return !noChildren[tagName];
	};
})();