Fix ESLint errors following @typescript-eslint/eslint-plugin upgrade

Author: wimpyprogrammer

demo/src/components/demo-form.ts

@@ -27,9 +27,9 @@ export default class DemoForm {
 	protected $errorContainer: HTMLDivElement;
 	protected $errorMessage: HTMLPreElement;
 
-	// eslint-disable-next-line @typescript-eslint/no-empty-function, class-methods-use-this
+	// eslint-disable-next-line class-methods-use-this
 	public onSubmit: () => void = () => {};
-	// eslint-disable-next-line @typescript-eslint/no-empty-function, class-methods-use-this
+	// eslint-disable-next-line class-methods-use-this
 	public onCancel: () => void = () => {};
 
 	private onInputKeydown(event: KeyboardEvent): boolean {
@@ -102,7 +102,7 @@ export default class DemoForm {
 	public validate(): boolean {
 		try {
 			return this.$form.reportValidity();
-		} catch (ex) {
+		} catch {
 			// Ignore browsers that don't support reportValidity()
 			return true;
 		}

demo/src/utils/dom.ts

@@ -1,4 +1,3 @@
 export function getElement<T extends Element>(selector: string): T {
-	// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 	return document.querySelector(selector)!;
 }

demo/src/worker/messages.ts

@@ -1,4 +1,4 @@
-/* eslint-disable max-classes-per-file, no-useless-constructor */
+/* eslint-disable max-classes-per-file, no-empty-function, no-useless-constructor */
 import { expand } from 'regex-to-strings';
 
 interface WorkerMessage {

demo/webpack.config.js

@@ -1,5 +1,5 @@
 /// <reference types="node" />;
-/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable @typescript-eslint/no-require-imports */
 const { resolve } = require('path');
 const { CleanWebpackPlugin } = require('clean-webpack-plugin');