⬆️ ESLint 9 (#227)

eslint.config.js

@@ -0,0 +1,96 @@
+import eslint from '@eslint/js'
+import prettier from 'eslint-config-prettier'
+import svelte from 'eslint-plugin-svelte'
+import globals from 'globals'
+import svelteParser from 'svelte-eslint-parser'
+import tseslint from 'typescript-eslint'
+
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+
+export default tseslint.config(
+	{
+		// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+		extends: [
+			eslint.configs.recommended,
+			...tseslint.configs.strictTypeChecked,
+			...tseslint.configs.stylisticTypeChecked,
+			prettier,
+		],
+		files: ['.js', '.mjs', '.mts', '.svelte', '.ts'].flatMap(e => [`**/*${e}`, `*${e}`]),
+		languageOptions: {
+			globals: { ...globals.browser, ...globals.node },
+			parser: tseslint.parser,
+			parserOptions: { extraFileExtensions: ['.svelte'], project: './tsconfig.eslint.json' },
+		},
+		rules: {
+			'@typescript-eslint/class-methods-use-this': [
+				'error',
+				{ ignoreClassesThatImplementAnInterface: true, ignoreOverrideMethods: true },
+			],
+			'@typescript-eslint/consistent-type-exports': 'error',
+			'@typescript-eslint/consistent-type-imports': [
+				'error',
+				{ fixStyle: 'separate-type-imports' },
+			],
+			'@typescript-eslint/default-param-last': 'error',
+			'@typescript-eslint/explicit-member-accessibility': ['error', { accessibility: 'no-public' }],
+			'@typescript-eslint/method-signature-style': 'error',
+			'@typescript-eslint/no-import-type-side-effects': 'error',
+			'@typescript-eslint/no-unnecessary-qualifier': 'error',
+			'@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+			'@typescript-eslint/no-useless-empty-export': 'error',
+			'@typescript-eslint/prefer-nullish-coalescing': ['error', { ignorePrimitives: true }],
+			'@typescript-eslint/prefer-readonly': 'error',
+			'@typescript-eslint/prefer-regexp-exec': 'error',
+			'@typescript-eslint/promise-function-async': ['error', { checkArrowFunctions: false }],
+			'@typescript-eslint/require-array-sort-compare': 'error',
+			'@typescript-eslint/restrict-template-expressions': [
+				'error',
+				{ allowBoolean: true, allowNullish: true, allowNumber: true, allowRegExp: true },
+			],
+			'@typescript-eslint/return-await': 'error',
+			'@typescript-eslint/sort-type-constituents': 'error',
+			'@typescript-eslint/switch-exhaustiveness-check': 'error',
+			'func-style': ['error', 'declaration'],
+
+			'@typescript-eslint/no-throw-literal': 'off',
+			'@typescript-eslint/only-throw-error': 'off',
+			'@typescript-eslint/unbound-method': 'off',
+			'@typescript-eslint/use-unknown-in-catch-callback-variable': 'off',
+		},
+	},
+
+	{
+		// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+		extends: [...svelte.configs['flat/recommended'], ...svelte.configs['flat/prettier']],
+		files: ['.svelte'].flatMap(e => [`**/*${e}`, `*${e}`]),
+		languageOptions: {
+			parser: svelteParser,
+			parserOptions: { project: './tsconfig.eslint.json', parser: tseslint.parser },
+		},
+		rules: { 'svelte/no-at-html-tags': 'off' },
+	},
+
+	{
+		ignores: [
+			'.pnpm-store/',
+			'.svelte-kit/',
+			'android/app/build/',
+			'android/app/src/main/assets/public/',
+			'build/',
+			'capacitor-cordova-android-plugins/',
+			'coverage/',
+			'dist/',
+			'node_modules/',
+			'package/',
+			'playwright-report/',
+			'test-results/',
+
+			'*.cjs',
+			'*.tsbuildinfo',
+			'**/$types.d.ts',
+			'vite.config.js.timestamp-*',
+			'vite.config.ts.timestamp-*',
+		],
+	},
+)

package.json

@@ -86,6 +86,7 @@
 	"devDependencies": {
 		"@capacitor/assets": "^3.0.5",
 		"@capacitor/cli": "^5.7.8",
+		"@eslint/js": "^9.9.1",
 		"@natoboram/heroicons.svelte": "^1.0.6",
 		"@playwright/test": "^1.41.2",
 		"@prettier/plugin-xml": "^3.4.1",
@@ -100,14 +101,13 @@
 		"@trivago/prettier-plugin-sort-imports": "^4.3.0",
 		"@ts-stack/markdown": "^1.5.0",
 		"@types/cookie": "^0.6.0",
-		"@typescript-eslint/eslint-plugin": "^7.1.0",
-		"@typescript-eslint/parser": "^7.1.0",
 		"@vitejs/plugin-basic-ssl": "^1.1.0",
 		"autoprefixer": "^10.4.20",
 		"cookie": "^0.6.0",
-		"eslint": "^8.57.0",
+		"eslint": "^9.9.1",
 		"eslint-config-prettier": "^9.1.0",
-		"eslint-plugin-svelte": "^2.35.1",
+		"eslint-plugin-svelte": "^2.43.0",
+		"globals": "^15.9.0",
 		"highlight.js": "^11.10.0",
 		"lemmy-js-client": "0.19.0",
 		"postcss": "^8.4.42",
@@ -117,9 +117,11 @@
 		"publint": "^0.2.10",
 		"svelte": "^4.2.19",
 		"svelte-check": "^3.8.6",
+		"svelte-eslint-parser": "^0.41.0",
 		"tailwindcss": "^3.4.10",
 		"tslib": "^2.7.0",
 		"typescript": "^5.5.4",
+		"typescript-eslint": "^8.3.0",
 		"vite": "^5.0.12",
 		"vitest": "^1.2.2"
 	},