diff --git a/output/js/util.js b/output/js/util.js
index 34111f4..edf52be 100644
--- a/output/js/util.js
+++ b/output/js/util.js
@@ -322,6 +322,7 @@ function createElement(tag, ...args) {
 	return element;
 }
 
+/** @type {Record<string, (...args: any | HTMLElement): HTMLElement>} */
 export const element = new Proxy({}, {
 	get(_, key) {
 		return (...args) => createElement(key, ...args)
diff --git a/output/main.js b/output/main.js
index 36b9b77..dc846db 100644
--- a/output/main.js
+++ b/output/main.js
@@ -15,7 +15,7 @@
 
 // Import magic numbers and data
 import {
-	dom, COLUMN, COLUMN_LITERAL, COMPARISON, ATTRIBUTES,
+	dom, COMPARISON, ATTRIBUTES,
 	columnAscendingByDefault, columnIsSortable, COLUMN_TRANSFORMATION,
 	element, JOIN_URL_PASTE, communityQRCodeURL, STAFF_ID_PASTE, IDENTIFIER_PASTE, DETAILS_LINK_PASTE, CLASSES, flagToLanguageAscii, RoomInfo, unreachable, workOnMainThread, onInteractive
 } from './js/util.js';
@@ -64,7 +64,6 @@ let shownCommunityId = "";
 
 /**
  * Create an interactive version of the Community join link.
- * @param {string} join_link
  * @returns {HTMLElement}
  */
 const transformJoinURL = () => {
@@ -153,6 +152,19 @@ function addInformativeInteractions() {
 	});
 }
 
+function enableEnterClicks() {
+	Array.from(document.querySelectorAll('.enter-clicks')).forEach(element => {
+		if (!(element instanceof HTMLElement)) return;
+		element.addEventListener('keydown', (/** @type {KeyboardEvent} */ ev) => {
+			if (ev.key == "Enter") {
+				if (!(ev.currentTarget instanceof HTMLElement)) {
+					console.error(".enter-clicks could not find its currentTarget");
+				} else ev.currentTarget.click();
+			}
+		})
+	})
+}
+
 async function fetchTableRestFragment() {
 	if (location.pathname != "/") return;
 	const request = await fetch("/_fragment/rest/");
@@ -182,14 +194,7 @@ async function onLoad() {
 		preloadImages();
 	}, 60 * 60E3);
 	addInformativeInteractions();
-	Array.from(document.querySelectorAll('.enter-clicks')).forEach(element => {
-		// @ts-ignore
-		element.addEventListener('keydown', (/** @type {KeyboardEvent} */ ev) => {
-			if (ev.key == "Enter") {
-				ev.currentTarget.click();
-			}
-		})
-	})
+	enableEnterClicks();
 	await RoomInfo.fetchRooms();
 	reactToURLParameters();
 	addServerIconInteractions();
@@ -200,7 +205,7 @@ async function onLoad() {
  * Construct room tag DOM from its description.
  * @param {Object} param0
  * @param {string} param0.text Tag name
- * @param {"user"|"reserved"} param0.type Tag classification
+ * @param {string} param0.type Tag classification
  * @param {string} param0.description Tag details
  * @returns HTMLElement
  */
@@ -253,15 +258,22 @@ function displayQRModal(communityID, pane = 0) {
 
 	const tagContainer = dom.details_modal_tag_container();
 
-	tagContainer.innerHTML = "";
+	if (tagContainer) {
 
-	tagContainer.append(
-		...rowInfo.tags.map(tag => tagBody(tag))
-	);
+		tagContainer.innerHTML = "";
 
-	dom.details_modal_qr_code().src = communityQRCodeURL(communityID);
+		tagContainer.append(
+			...rowInfo.tags.map(tag => tagBody(tag))
+		);
+
+	} else console.error(`Could not find tag container for ${communityID}`);
 
-	document.getElementById('details-modal-panes').setAttribute('data-pane', pane);
+	const qrCode = dom.details_modal_qr_code();
+	if (qrCode instanceof HTMLImageElement) {
+		qrCode.src = communityQRCodeURL(communityID);
+	} else console.error(`Could not find QR code <img>`);
+
+	document.getElementById('details-modal-panes')?.setAttribute('data-pane', `${pane}`);
 
 	location.hash=`#${communityID}`;
 
@@ -272,7 +284,8 @@ function displayQRModal(communityID, pane = 0) {
  * Hides the Community details modal.
  */
 function hideQRModal() {
-	dom.details_modal().close();
+	const detailsModal = dom.details_modal();
+	if (detailsModal) detailsModal.close(); else console.error("hideQRModal(): detailsModal is null")
 	shownCommunityId = "";
 }
 
@@ -301,7 +314,7 @@ function addQRModalHandlers() {
 				displayQRModal(communityID);
 			}
 		)
-		row.querySelector('.td_name').addEventListener(
+		row.querySelector('.td_name')?.addEventListener(
 			'click',
 			(e) => {
 				e.preventDefault();
@@ -311,17 +324,20 @@ function addQRModalHandlers() {
 
 	}
 
-	const closeButton =
-		dom.details_modal().querySelector('#details-modal-close');
-	closeButton.addEventListener(
-		'click',
-		() => hideQRModal()
-	);
-	dom.details_modal().addEventListener('click', function (e) {
-		if (this == e.target) {
-			this.close();
-		}
-	});
+	const detailsModal = dom.details_modal();
+
+	if (detailsModal) {
+		const closeButton = detailsModal.querySelector('#details-modal-close');
+		closeButton?.addEventListener(
+			'click',
+			() => hideQRModal()
+		);
+		detailsModal.addEventListener('click', function (e) {
+			if (this == e.target) {
+				this.close();
+			}
+		});
+	} else console.error("Could not find details modal");
 
 	for (const button of document.querySelectorAll('.details-modal-pane-button')) {
 		button.addEventListener(
@@ -333,7 +349,7 @@ function addQRModalHandlers() {
 		)
 	}
 
-	document.querySelector('#details-modal-copy-button').addEventListener(
+	document.querySelector('#details-modal-copy-button')?.addEventListener(
 		'click',
 		function () {
 			copyToClipboard(this.getAttribute('data-href'));
@@ -391,7 +407,8 @@ function addQRModalHandlers() {
 		const increment = isLeftArrowKey ? -1 : 1;
 		const newRowIndex = (shownRowIndex + increment + communityRows.length) % communityRows.length;
 		const newRowIdentifier = communityRows[newRowIndex].identifier;
-		displayQRModal(newRowIdentifier);
+		if (newRowIdentifier === null) console.error("newRowIdentifier is null");
+		else displayQRModal(newRowIdentifier);
 	})
 
 }
@@ -637,6 +654,7 @@ function compareAscending(fst, snd) {
 	// Triple equals to avoid "" == 0.
 	if (fst === "") return COMPARISON.GREATER;
 	if (snd === "") return COMPARISON.SMALLER;
+	// @ts-ignore
 	return (fst > snd) - (fst < snd);
 }
 
@@ -699,8 +717,16 @@ function getSortState(table) {
 	const directionState = table.getAttribute(ATTRIBUTES.SORTING.ASCENDING);
 	// This is not pretty, but the least annoying.
 	// Checking for classes would be more idiomatic.
+	if (directionState === null) {
+		console.error("directionState was null");
+		return null;
+	}
 	const ascending = directionState.toString() === "true";
 	const columnState = table.getAttribute(ATTRIBUTES.SORTING.COLUMN);
+	if (columnState === null) {
+		console.error("columnState was null");
+		return null;
+	}
 	const column = parseInt(columnState);
 	if (!Number.isInteger(column)) {
 		throw new Error(`Invalid column number read from table: ${columnState}`)
@@ -715,22 +741,23 @@ function getSortState(table) {
  */
 function setSortState(table, { ascending, column }) {
 	if (!table.hasAttribute(ATTRIBUTES.SORTING.ACTIVE)) {
-		table.setAttribute(ATTRIBUTES.SORTING.ACTIVE, true);
+		table.setAttribute(ATTRIBUTES.SORTING.ACTIVE, `${true}`);
 	}
-	table.setAttribute(ATTRIBUTES.SORTING.ASCENDING, ascending);
-	table.setAttribute(ATTRIBUTES.SORTING.COLUMN, column);
+	table.setAttribute(ATTRIBUTES.SORTING.ASCENDING, `${ascending}`);
+	table.setAttribute(ATTRIBUTES.SORTING.COLUMN, `${column}`);
 
 	// No way around this for brief CSS.
 	const headers = table.querySelectorAll("th");
 	headers.forEach((th, colno) => {
 		th.removeAttribute(ATTRIBUTES.SORTING.ACTIVE);
 	});
-	headers[column].setAttribute(ATTRIBUTES.SORTING.ACTIVE, true);
+	headers[column].setAttribute(ATTRIBUTES.SORTING.ACTIVE, `${true}`);
 }
 
 // This is best done in JS, as it would require <noscript> styles otherwise.
 function markSortableColumns() {
 	const table = dom.tbl_communities();
+	if (!table) throw new Error("markSortableColumns(): could not find table");
 	const header_cells = table.querySelectorAll('th');
 	for (let colno = 0; colno < header_cells.length; colno++) {
 		if (!columnIsSortable(colno)) continue;