diff --git a/.eslintrc.js b/.eslintrc.js
index 12d0c9246c..80f3c77887 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -29,5 +29,7 @@ module.exports = {
 		'jsdoc/require-param-description': 'off',
 		'jsdoc/require-param-type': 'off',
 		'jsdoc/require-property-description': 'off',
+		'@typescript-eslint/no-unused-vars': 'off',
+		'@typescript-eslint/no-explicit-any': 'off',
 	}
 }
diff --git a/src/helpers/getLoggedInUser.js b/src/helpers/getLoggedInUser.js
index df9f5c8a34..c75a03fa2d 100644
--- a/src/helpers/getLoggedInUser.js
+++ b/src/helpers/getLoggedInUser.js
@@ -6,9 +6,7 @@
 import { loadState } from '@nextcloud/initial-state'
 
 /**
- * Gets the current user's display name if logged in.
- *
- * @return boolean | string
+ * @return {boolean|string} Gets the current user's display name if logged in.
  */
 function getLoggedInUser() {
 	return loadState('richdocuments', 'loggedInUser')
diff --git a/src/services/config.tsx b/src/services/config.tsx
index f57ecae817..be9cc5d290 100644
--- a/src/services/config.tsx
+++ b/src/services/config.tsx
@@ -6,19 +6,20 @@ import { loadState } from '@nextcloud/initial-state'
 
 class ConfigService {
 
-    private values: {[name: string]: any}
+	private values: {[name: string]: any}
 
-    constructor () {
+	constructor() {
 		this.values = loadState('richdocuments', 'document', {})
 	}
 
-    update(key: string, value: any) {
-        this.values[key] = value
-    }
+	update(key: string, value: any) {
+		this.values[key] = value
+	}
+
+	get(key: string): any {
+		return this.values[key]
+	}
 
-    get(key: string): any {
-        return this.values[key]
-    }
 }
 
 const Config = new ConfigService()
diff --git a/src/services/postMessage.tsx b/src/services/postMessage.tsx
index 009ea0520b..5f7a239823 100644
--- a/src/services/postMessage.tsx
+++ b/src/services/postMessage.tsx
@@ -2,24 +2,31 @@
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-import { emit } from "@nextcloud/event-bus"
+import { emit } from '@nextcloud/event-bus'
 
 type MessageEventSource = Window | MessagePort | ServiceWorker;
 
+export interface WopiPostValues {
+	Deprecated?: boolean;
+}
 export interface WopiPost {
 	MessageId: string;
 	Values: WopiPostValues;
 }
 
-export interface WopiPostValues {
-	Deprecated?: boolean;
+interface WindowCallbackHandler { (): Window}
+
+interface PostMessageHandlerParam {
+	data: any;
+	parsed: { msgId: string, args: WopiPostValues, deprecated: boolean }
 }
 
-interface WindowCallbackHandler { (): Window}
+type PostMessageHandler = (values: PostMessageHandlerParam) => void;
 
 export default class PostMessageService {
-	private readonly targets: {[name: string]: (Window|WindowCallbackHandler)};
-	private postMessageHandlers: Function[] = [];
+
+	private readonly targets: {[name: string]: (Window|WindowCallbackHandler)}
+	private postMessageHandlers: PostMessageHandler[] = []
 
 	constructor(targets: {[name: string]: (Window|WindowCallbackHandler)}) {
 		this.targets = targets
@@ -29,7 +36,7 @@ export default class PostMessageService {
 	}
 
 	sendPostMessage(target: string, message: any, targetOrigin: string = '*') {
-		let targetElement: Window;
+		let targetElement: Window
 		if (typeof this.targets[target] === 'function') {
 			targetElement = (this.targets[target] as WindowCallbackHandler)()
 		} else {
@@ -39,12 +46,11 @@ export default class PostMessageService {
 		console.debug('PostMessageService.sendPostMessage', target, message)
 	}
 
-
 	sendWOPIPostMessage(target: string, msgId: string, values: any = {}) {
 		const msg = {
 			MessageId: msgId,
 			SendTime: Date.now(),
-			Values: values
+			Values: values,
 		}
 
 		this.sendPostMessage(target, JSON.stringify(msg))
@@ -66,17 +72,17 @@ export default class PostMessageService {
 		return { msgId, args, deprecated }
 	}
 
-	registerPostMessageHandler(callback: Function) {
+	registerPostMessageHandler(callback: PostMessageHandler) {
 		this.postMessageHandlers.push(callback)
 	}
 
-	unregisterPostMessageHandler(callback: Function) {
+	unregisterPostMessageHandler(callback: PostMessageHandler) {
 		const handlerIndex = this.postMessageHandlers.findIndex(cb => cb === callback)
 		delete this.postMessageHandlers[handlerIndex]
 	}
 
 	private handlePostMessage(data: any) {
-		const parsed = PostMessageService.parsePostMessage(data);
+		const parsed = PostMessageService.parsePostMessage(data)
 		if (typeof parsed === 'undefined' || parsed === null) {
 			return
 		}
@@ -88,15 +94,15 @@ export default class PostMessageService {
 			}
 		} catch (e) {}
 
-		this.postMessageHandlers.forEach((fn: Function): void => {
+		this.postMessageHandlers.forEach((fn: PostMessageHandler): void => {
 			if (parsed.deprecated) {
 				console.debug('PostMessageService.handlePostMessage', 'Ignoring deprecated post message', parsed.msgId)
-				return;
+				return
 			}
 			try {
 				fn({
-					data: data,
-					parsed
+					data,
+					parsed,
 				})
 			} catch (e) {
 				console.error('Error during post message handler', parsed, e)
diff --git a/src/view/DocumentTargetPicker.vue b/src/view/DocumentTargetPicker.vue
index 8ffdc1ed75..92286f7fa4 100644
--- a/src/view/DocumentTargetPicker.vue
+++ b/src/view/DocumentTargetPicker.vue
@@ -93,7 +93,6 @@ export default {
 			}
 		},
 		async openFilePicker() {
-			const self = this
 			await getFilePickerBuilder(t('files', 'Select file or folder to link to'))
 				.setMimeTypeFilter(getCapabilities().mimetypes)
 				.addButton({
@@ -101,8 +100,8 @@ export default {
 					callback: (files) => {
 						const file = files[0]
 						this.fileId = file.fileid
-						self.filePath = file.path
-						self.fetchReferences()
+						this.filePath = file.path
+						this.fetchReferences()
 					},
 				})
 				.setContainer(this.$refs.picker)
diff --git a/src/viewer.js b/src/viewer.js
index a588760b42..2b5e2b2be6 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -23,4 +23,4 @@ if (OCA.Viewer) {
 	})
 }
 
-autoSetupBuiltInCodeServerIfNeeded()
\ No newline at end of file
+autoSetupBuiltInCodeServerIfNeeded()