.eslintrc.json

{
  "env": {
    "browser": true,
    "es6": true,
    "node": true 
  },
  "extends": ["eslint:recommended", "plugin:prettier/recommended"],
  "ignorePatterns": ["dist/**/*"],
  "parser": "@typescript-eslint/parser",
  "overrides": [
    {
      "files": ["src/**/*.{ts, tsx}"],
      "extends": [
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking"
      ],
      "parser": "@typescript-eslint/parser",
      "parserOptions": {
        "ecmaFeatures": { "jsx": true },
        "ecmaVersion": 2021,
        "project": ["tsconfig.json"],
        "sourceType": "module",
        "warnOnUnsupportedTypeScriptVersion": false
      },
      "rules": {
        "@typescript-eslint/no-invalid-this": ["error"],
        "@typescript-eslint/no-useless-constructor": ["error"]
      }
    }
  ],
  "globals": {
    "React": "readonly"
  },
  "plugins": ["@typescript-eslint", "import", "prettier"],
  "root": true,
  "rules": {
    "no-console": "warn",
    "no-extra-semi": "error",
    "no-unsafe-negation": "error",
    "default-case": "error",
    "eqeqeq": ["error", "always", { "null": "ignore" }],
    "no-unused-vars": "warn",
    "comma-spacing": "error",
    "newline-before-return": "error",
    "max-len": ["error", {
      "code": 100,
      "ignoreUrls": true
    }],
    "no-useless-return": "error",
    "import/order": [
      "error",
      {
        "alphabetize": { "order": "asc" },
        "groups": [["builtin", "external", "unknown"], ["internal", "parent", "index", "sibling"]],
        "newlines-between": "always"
      }
    ],
    "prettier/prettier": "error"
  }
}