eslint.config.mjs

import typescriptEslint from "@typescript-eslint/eslint-plugin";
import globals from "globals";
import tsParser from "@typescript-eslint/parser";
import path from "node:path";
import { fileURLToPath } from "node:url";
import js from "@eslint/js";
import { FlatCompat } from "@eslint/eslintrc";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

export default [
  {
    ignores: ["**/dist/"],
  },
  ...compat.extends(
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
  ),
  {
    plugins: {
      "@typescript-eslint": typescriptEslint,
    },

    languageOptions: {
      globals: {
        ...Object.fromEntries(
          Object.entries(globals.browser).map(([key]) => [key, "off"]),
        ),
      },

      parser: tsParser,
      ecmaVersion: "latest",
      sourceType: "module",
    },

    rules: {
      indent: [
        "warn",
        2,
        {
          SwitchCase: 1,
          VariableDeclarator: 1,
          outerIIFEBody: 1,
          MemberExpression: 1,
          FunctionDeclaration: { parameters: 1, body: 1 },
          FunctionExpression: { parameters: 1, body: 1 },
          CallExpression: { arguments: 1 },
          ArrayExpression: 1,
          ObjectExpression: 1,
          ImportDeclaration: 1,
          flatTernaryExpressions: false,
          offsetTernaryExpressions: true,
          ignoreComments: false,
        },
      ],
      "no-tabs": "error",
      "linebreak-style": ["error", "unix"],
      quotes: ["error", "double"],
      semi: ["error", "always"],
      "comma-dangle": ["error", "always-multiline"],

      "@typescript-eslint/no-unused-vars": [
        "error",
        {
          varsIgnorePattern: "^_",
        },
      ],
    },
  },
  {
    files: ["**/.eslintrc.{js,cjs}"],

    languageOptions: {
      globals: {
        ...globals.node,
      },

      ecmaVersion: 5,
      sourceType: "commonjs",
    },
  },
];