Added null checks

scripts/AnimeNotifier.ts

@@ -27,7 +27,7 @@ export default class AnimeNotifier {
 	visibilityObserver: IntersectionObserver
 	pushManager: PushManager
 	serviceWorkerManager: ServiceWorkerManager
-	notificationManager: NotificationManager
+	notificationManager: NotificationManager | undefined
 	touchController: TouchController
 	audioPlayer: AudioPlayer
 	videoPlayer: VideoPlayer
@@ -126,8 +126,8 @@ export default class AnimeNotifier {
 
 		// Status message
 		this.statusMessage = new StatusMessage(
-			document.getElementById("status-message"),
-			document.getElementById("status-message-text")
+			document.getElementById("status-message") as HTMLElement,
+			document.getElementById("status-message-text") as HTMLElement
 		)
 
 		this.app.onError = (error: Error) => {
@@ -138,7 +138,12 @@ export default class AnimeNotifier {
 		this.pushManager = new PushManager()
 
 		// Notification manager
-		this.notificationManager = new NotificationManager()
+		if(this.user) {
+			this.notificationManager = new NotificationManager(
+				document.getElementById("notification-icon") as HTMLElement,
+				document.getElementById("notification-count") as HTMLElement
+			)
+		}
 
 		// Audio player
 		this.audioPlayer = new AudioPlayer(this)
@@ -248,7 +253,7 @@ export default class AnimeNotifier {
 		}
 
 		// Notification manager
-		if(this.user) {
+		if(this.notificationManager) {
 			this.notificationManager.update()
 		}
 

scripts/Application.ts

@@ -257,7 +257,7 @@ export default class Application {
 	}
 
 	scrollToTop() {
-		let parent : HTMLElement | null = this.content
+		let parent: any = this.content
 
 		Diff.mutations.queue(() => {
 			while(parent = parent.parentElement) {

scripts/AudioPlayer.ts

@@ -6,7 +6,7 @@ export default class AudioPlayer {
 
 	// Web audio
 	audioContext: AudioContext
-	audioNode: AudioBufferSourceNode
+	audioNode: AudioBufferSourceNode | null
 	gainNode: GainNode
 
 	// Parameters
@@ -30,7 +30,7 @@ export default class AudioPlayer {
 
 	constructor(arn: AnimeNotifier) {
 		this.arn = arn
-		this.audioPlayer = document.getElementById("audio-player")
+		this.audioPlayer = document.getElementById("audio-player") as HTMLElement
 		this.audioPlayerPlay = document.getElementById("audio-player-play") as HTMLButtonElement
 		this.audioPlayerPause = document.getElementById("audio-player-pause") as HTMLButtonElement
 		this.trackLink = document.getElementById("audio-player-track-title") as HTMLLinkElement

scripts/DateView.ts

@@ -103,7 +103,7 @@ export function displayAiringDate(element: HTMLElement, now: Date) {
 }
 
 export function displayDate(element: HTMLElement, now: Date) {
-	if(element.dataset.date === "") {
+	if(!element.dataset.date) {
 		element.textContent = ""
 		return
 	}

scripts/NotificationManager.ts

@@ -5,9 +5,9 @@ export default class NotificationManager {
 	icon: HTMLElement
 	counter: HTMLElement
 
-	constructor() {
-		this.icon = document.getElementById("notification-icon")
-		this.counter = document.getElementById("notification-count")
+	constructor(icon: HTMLElement, counter: HTMLElement) {
+		this.icon = icon
+		this.counter = counter
 	}
 
 	async update() {

scripts/ServerEvents.ts

@@ -91,6 +91,10 @@ export default class ServerEvents {
 	}
 
 	notificationCount(e: ServerEvent) {
+		if(!this.arn.notificationManager) {
+			return
+		}
+
 		this.arn.notificationManager.setCounter(parseInt(e.data))
 	}
 }

scripts/ServiceWorkerManager.ts

@@ -77,7 +77,10 @@ export default class ServiceWorkerManager {
 
 		switch(message.type) {
 			case "new notification":
+				if(this.arn.notificationManager) {
 					this.arn.notificationManager.update()
+				}
+
 				break
 
 			// case "new content":

scripts/Utils/swapElements.ts

@@ -1,22 +1,23 @@
+// swapElements assumes that both elements have valid parent nodes.
 export function swapElements(a: Node, b: Node) {
-	let parent = b.parentNode
+	let bParent = b.parentNode as Node
 	let bNext = b.nextSibling
 
 	// Special case for when a is the next sibling of b
 	if(bNext === a) {
 		// Just put a before b
-		parent.insertBefore(a, b)
+		bParent.insertBefore(a, b)
 	} else {
 		// Insert b right before a
-		a.parentNode.insertBefore(b, a)
+		(a.parentNode as Node).insertBefore(b, a)
 
 		// Now insert a where b was
 		if(bNext) {
 			// If there was an element after b, then insert a right before that
-			parent.insertBefore(a, bNext)
+			bParent.insertBefore(a, bNext)
 		} else {
 			// Otherwise just append it as the last child
-			parent.appendChild(a)
+			bParent.appendChild(a)
 		}
 	}
 }