eslint 9.x compatibility

.gitignore

@@ -1,2 +1,2 @@
 node_modules/
-yarn.lock
+package-lock.json

index.js

@@ -1,106 +1,117 @@
-/**
- * @type {import("eslint").Linter.Config}
- */
-module.exports = {
-  extends: [
-    "eslint:recommended",
-  ],
-  parserOptions: {
-    sourceType: "module",
-    ecmaVersion: 2018, // recommended minimum target, probably overridden by project
+export default [{
+  languageOptions: {
+      ecmaVersion: 2018,
+      sourceType: "module",
   },
-  rules: {
-    // Stylistic:
-    "brace-style": "error",
-    "camelcase": ["error", {
-      properties: "never",
-      ignoreDestructuring: true,
-    }],
-    "comma-dangle": ["error", "always-multiline"],
-    "comma-spacing": "error",
-    "comma-style": "error",
-    "curly": ["error", "all"],
-    "func-call-spacing": "error",
-    "max-len": ["warn", {
-      code: 120,
-      tabWidth: 2,
-      ignoreComments: false,
-      ignoreUrls: true,
-      ignoreStrings: true,
-      ignoreTemplateLiterals: true,
-      ignoreRegExpLiterals: true,
-    }],
-    "no-multiple-empty-lines": ["error", { max: 1 }],
-    "no-tabs": "error",
-    "no-trailing-spaces": "error",
-    "object-curly-spacing": ["error", "always"],
-    "one-var": ["error", {
-      var: "never",
-      let: "never",
-      const: "never",
-    }],
-    "operator-linebreak": ["error", "after"],
-    "padded-blocks": ["error", "never"],
-    "quote-props": ["error", "consistent-as-needed"],
-    "quotes": ["error", "double", {
-      avoidEscape: true,
-      allowTemplateLiterals: true,
-    }],
-    "semi": "error",
-    "semi-spacing": "error",
-    "space-before-blocks": "error",
-    "space-before-function-paren": ["error", {
-      named: "never",
-      anonymous: "always",
-      asyncArrow: "always",
-    }],
-    "spaced-comment": ["error", "always", {
-      line: {
-        markers: ["/"],
-        exceptions: ["-", "+"],
-      },
-      block: {
-        markers: ["!"],
-        exceptions: ["*"],
-        balanced: true,
-      },
-    }],
-    "template-tag-spacing": ["error", "never"],
 
-    // ES6:
-    "arrow-body-style": ["error", "as-needed", {
-      requireReturnForObjectLiteral: false,
-    }],
-    "arrow-parens": ["error", "always"],
-    "arrow-spacing": ["error", { before: true, after: true }],
-    "no-confusing-arrow": ["error", { allowParens: true }],
-    "no-var": "error",
-    "prefer-const": ["error", {
-      destructuring: "any",
-      ignoreReadBeforeAssign: true,
-    }],
-    "prefer-destructuring": ["error", {
-      VariableDeclarator: {
-        array: false,
-        object: true,
-      },
-      AssignmentExpression: {
-        array: true,
-        object: false,
-      },
-    }],
-    "prefer-rest-params": "error",
-    "prefer-spread": "error",
-    "template-curly-spacing": "error",
+  rules: {
+      "brace-style": "error",
+
+      camelcase: ["error", {
+          properties: "never",
+          ignoreDestructuring: true,
+      }],
+
+      "comma-dangle": ["error", "always-multiline"],
+      "comma-spacing": "error",
+      "comma-style": "error",
+      curly: ["error", "all"],
+      "func-call-spacing": "error",
+
+      "max-len": ["warn", {
+          code: 120,
+          tabWidth: 2,
+          ignoreComments: false,
+          ignoreUrls: true,
+          ignoreStrings: true,
+          ignoreTemplateLiterals: true,
+          ignoreRegExpLiterals: true,
+      }],
+
+      "no-multiple-empty-lines": ["error", {
+          max: 1,
+      }],
+
+      "no-tabs": "error",
+      "no-trailing-spaces": "error",
+      "object-curly-spacing": ["error", "always"],
+
+      "one-var": ["error", {
+          var: "never",
+          let: "never",
+          const: "never",
+      }],
+
+      "operator-linebreak": ["error", "after"],
+      "padded-blocks": ["error", "never"],
+      "quote-props": ["error", "consistent-as-needed"],
+
+      quotes: ["error", "double", {
+          avoidEscape: true,
+          allowTemplateLiterals: true,
+      }],
+
+      semi: "error",
+      "semi-spacing": "error",
+      "space-before-blocks": "error",
+
+      "space-before-function-paren": ["error", {
+          named: "never",
+          anonymous: "always",
+          asyncArrow: "always",
+      }],
+
+      "spaced-comment": ["error", "always", {
+          line: {
+              markers: ["/"],
+              exceptions: ["-", "+"],
+          },
+
+          block: {
+              markers: ["!"],
+              exceptions: ["*"],
+              balanced: true,
+          },
+      }],
+
+      "template-tag-spacing": ["error", "never"],
+
+      "arrow-body-style": ["error", "as-needed", {
+          requireReturnForObjectLiteral: false,
+      }],
+
+      "arrow-parens": ["error", "always"],
+
+      "arrow-spacing": ["error", {
+          before: true,
+          after: true,
+      }],
+
+      "no-confusing-arrow": ["error", {
+          allowParens: true,
+      }],
+
+      "no-var": "error",
+
+      "prefer-const": ["error", {
+          destructuring: "any",
+          ignoreReadBeforeAssign: true,
+      }],
+
+      "prefer-destructuring": ["error", {
+          VariableDeclarator: {
+              array: false,
+              object: true,
+          },
+
+          AssignmentExpression: {
+              array: true,
+              object: false,
+          },
+      }],
+
+      "prefer-rest-params": "error",
+      "prefer-spread": "error",
+      "template-curly-spacing": "error",
   },
-  overrides: [
-    {
-      // TODO: JS-only config
-      files: ["*.js"],
-    },
-    {
-      // TODO: TypeScript-only config
-      files: ["*.ts"],
-    },
-  ],
-};
+}];

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@jakejarvis/eslint-config",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "description": "My ESLint config. Inspired heavily by eslint-config-google and moderately by eslint-config-airbnb.",
   "license": "MIT",
   "repository": "jakejarvis/eslint-config",
@@ -13,22 +13,11 @@
     "index.js"
   ],
   "main": "index.js",
-  "scripts": {
-    "lint": "eslint .",
-    "lint:fix": "eslint --fix ."
-  },
-  "dependencies": {},
   "devDependencies": {
-    "eslint": "^8.15.0"
+    "eslint": "^9.4.0"
   },
   "peerDependencies": {
-    "eslint": "^7 || >=8"
-  },
-  "eslintConfig": {
-    "extends": "./index.js",
-    "env": {
-      "node": true
-    }
+    "eslint": "^7 || ^8 || >=9"
   },
   "keywords": [
     "javascript",