.eslintrc.js

module.exports = {
  root: true,
  parser: "@typescript-eslint/parser",
  parserOptions: {
    tsconfigRootDir: __dirname,
    project: ["./tsconfig.json"],
  },
  ignorePatterns: ["node_modules", ".eslintrc.js", "next.config.js"],
  plugins: ["@typescript-eslint", "import"],
  extends: [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:@typescript-eslint/recommended-requiring-type-checking",
    "plugin:@next/next/recommended",
    "plugin:@typescript-eslint/strict-type-checked",
  ],
  settings: {
    "import/resolver": {
      typescript: true,
    },
  },
  rules: {
    // Possible Problems
    "array-callback-return": "error",
    "no-await-in-loop": "error",
    "no-constructor-return": "error",
    "no-promise-executor-return": "error",
    "no-self-compare": "error",
    "no-template-curly-in-string": "error",
    "no-unmodified-loop-condition": "error",
    "no-unreachable-loop": "error",
    "no-unused-private-class-members": "error",
    "no-use-before-define": "error",
    "require-atomic-updates": "error",

    // Suggestions
    camelcase: "error",
    "capitalized-comments": ["error", "always"],
    curly: ["error", "multi-line"],
    eqeqeq: "error",
    "no-console": "error",
    "no-invalid-this": "error",
    "prefer-const": [
      "error",
      {
        ignoreReadBeforeAssign: true,
      },
    ],

    // Layout & Formatting
    "array-bracket-newline": ["error", { multiline: true }],
    indent: ["error", 2, { SwitchCase: 1 }],
    quotes: ["error", "double"],
    semi: ["error", "always"],
    "brace-style": "error",
    "comma-dangle": ["error", "always-multiline"],
    "no-trailing-spaces": "error",
    "eol-last": "error",

    // Imports
    "import/first": "error",
    "import/newline-after-import": "error",
    "no-duplicate-imports": ["error", { includeExports: true }],
    "import/order": [
      "error",
      {
        groups: [
          "builtin",
          "external",
          ["internal", "parent", "sibling", "index"],
        ],
        "newlines-between": "always",
        distinctGroup: false,
        alphabetize: { order: "asc" },
        pathGroups: [
          {
            pattern: "@/app/**",
            group: "internal",
            position: "before",
          },
        ],
      },
    ],
  },
};