function openCategory(DOM) {
	DOM.parentNode.children[1].classList.remove("hidden");
}

function closeCategory(DOM) {
	DOM.parentNode.children[1].classList.add("hidden");
}

function toggleCategory(DOM) {
	let classes = DOM.parentNode.children[1].classList;
	classes[classes.contains("hidden") ? "remove" : "add"]("hidden");
}

/*
function postPageLoad() {
	let ent = document.getElementById("sidenav").children[1].children[0].children[0].children;

	for (let i = 0; i < ent.length; i++) {
		if (!ent[i].children[0].classList.contains("item"))
			continue;
		
		ent[i].children[0].onclick = toggleCategory(ent[i].children[0]);
	}
}
*/