[ticket/17517] Update to latest eslint

PHPBB-17517

eslint.config.mjs

@@ -0,0 +1,87 @@
+// eslint.config.mjs
+
+// Use Promise.all for parallel imports to improve loading performance
+const [
+	{ default: globalsAll },
+	{ default: unicorn },
+	{ default: importPlugin },
+	{ default: nodePlugin },
+	{ default: promisePlugin },
+] = await Promise.all([
+	import('globals'),
+	import('eslint-plugin-unicorn'),
+	import('eslint-plugin-import'),
+	import('eslint-plugin-n'),
+	import('eslint-plugin-promise'),
+]);
+
+export default [
+	// 🔒 Global ignore block — applies BEFORE any parsing
+	{
+		ignores: [
+			'phpBB/assets/javascript/cropper.js',
+			'phpBB/assets/javascript/hermite.js',
+			'phpBB/assets/javascript/jquery-cropper.js',
+			'phpBB/ext/**/*.js',
+			'phpBB/**/*.min.js',
+			'phpBB/vendor/**/*.js',
+			'phpBB/vendor-ext/**/*.js',
+			'phpBB/phpbb/**/*.js',
+			'phpBB/tests/**/*.js',
+		],
+	},
+
+	// 🌐 Main config for your source files
+	{
+		files: ['**/*.js'],
+		linterOptions: {
+			reportUnusedDisableDirectives: false,
+		},
+		languageOptions: {
+			ecmaVersion: 'latest',
+			sourceType: 'module',
+			globals: {
+				...globalsAll.browser,
+				...globalsAll.node,
+				...globalsAll.jquery,
+			},
+		},
+		plugins: {
+			unicorn,
+			import: importPlugin,
+			n: nodePlugin,
+			promise: promisePlugin,
+		},
+		rules: {
+			// Your personal customizations
+			'quotes': ['error', 'single'],
+			'comma-dangle': ['error', 'always-multiline'],
+			'block-spacing': 'error',
+			'array-bracket-spacing': ['error', 'always'],
+			'multiline-comment-style': 'off',
+			'computed-property-spacing': 'off',
+			'space-before-function-paren': ['error', 'never'],
+			'space-in-parens': 'off',
+			'capitalized-comments': 'off',
+			'object-curly-spacing': ['error', 'always'],
+			'no-lonely-if': 'off',
+			'unicorn/prefer-module': 'off',
+
+			// XO-inspired defaults
+			'semi': ['error', 'always'],
+			'eqeqeq': ['error', 'always'],
+			'curly': ['error', 'multi-line'],
+			'no-var': 'error',
+			'prefer-const': 'error',
+			'no-console': 'off',
+			'no-unused-vars': ['error', { argsIgnorePattern: '^_', varsIgnorePattern: '^_' }],
+			'unicorn/filename-case': ['off', { case: 'kebabCase' }],
+			'unicorn/no-null': 'off',
+			'unicorn/prefer-ternary': 'off',
+			'unicorn/no-array-for-each': 'off',
+			'import/order': ['error', { 'newlines-between': 'always' }],
+			'n/no-missing-import': 'error',
+			'promise/always-return': 'off',
+		},
+	},
+];

package.json

@@ -6,55 +6,6 @@
 	"directories": {
 		"doc": "docs"
 	},
-	"eslintConfig": {
-		"extends": "xo",
-		"ignorePatterns": [
-			"phpBB/assets/javascript/cropper.js",
-			"phpBB/assets/javascript/hermite.js",
-			"phpBB/assets/javascript/jquery-cropper.js",
-			"phpBB/ext/**/*.js",
-			"phpBB/**/*.min.js",
-			"phpBB/vendor/**/*.js",
-			"phpBB/vendor-ext/**/*.js",
-			"phpBB/phpbb/**/*.js",
-			"phpBB/tests/**/*.js"
-		],
-		"rules": {
-			"quotes": [
-				"error",
-				"single"
-			],
-			"comma-dangle": [
-				"error",
-				"always-multiline"
-			],
-			"block-spacing": "error",
-			"array-bracket-spacing": [
-				"error",
-				"always"
-			],
-			"multiline-comment-style": "off",
-			"computed-property-spacing": "off",
-			"space-before-function-paren": [
-				"error",
-				"never"
-			],
-			"space-in-parens": "off",
-			"capitalized-comments": "off",
-			"object-curly-spacing": [
-				"error",
-				"always"
-			],
-			"no-lonely-if": "off",
-			"unicorn/prefer-module": "off"
-		},
-		"env": {
-			"es6": true,
-			"browser": true,
-			"node": true,
-			"jquery": true
-		}
-	},
 	"browserslist": [
 		"> 1%",
 		"not ie 11",
@@ -91,8 +42,12 @@
 	"devDependencies": {
 		"autoprefixer": "^10.4.4",
 		"cssnano": "^5.1.7",
-		"eslint": "^8.13.0",
-		"eslint-config-xo": "^0.40.0",
+		"eslint": "^9.28.0",
+		"eslint-plugin-import": "^2.31.0",
+		"eslint-plugin-n": "^17.18.0",
+		"eslint-plugin-promise": "^7.2.1",
+		"eslint-plugin-unicorn": "^59.0.1",
+		"globals": "^16.2.0",
 		"gulp": "^5.0.0",
 		"gulp-concat": "^2.6.1",
 		"gulp-postcss": "^9.0.1",