.eslintrc

{
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint"
  ],
  "env": {
    "browser": true,
    "node": true
  },
  "extends": [
    "eslint:recommended",
    "airbnb-base",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [
          ".js",
          ".ts",
          ".d.ts"
        ]
      }
    }
  },
  "rules": {
    "no-param-reassign": "off",
    "comma-dangle": ["error", "never"],
    "import/no-extraneous-dependencies": ["error", {
      "optionalDependencies": false
    }],
    "import/extensions": ["error", {
      "js": "never",
      "ts": "never"
    }],
    "class-methods-use-this": "off"
  },
  "overrides": [
    {
      "plugins": ["jest"],
      "files": ["__tests__/**/*.test.js", "__tests__/**/*.test.ts"],
      "settings": {
        "import/resolver": {
          "node": {
            "extensions": [".js", ".json", ".ts"]
          }
        }
      },
      "extends": [
        "eslint:recommended",
        "airbnb-base",
        "plugin:jest/recommended",
        "plugin:@typescript-eslint/eslint-recommended",
        "plugin:@typescript-eslint/recommended"
      ],
      "env": { "node": true },
      "rules": {
        "@typescript-eslint/no-var-requires": ["off"],
        "no-console": ["off"],
        "import/extensions": ["error", {
          "js": "never",
          "ts": "never"
        }]
      }
    }
  ]
}