.eslintrc.json

{
  "root": true,
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint",
    "jest"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:jest/recommended",
    "plugin:jest/style"
  ],
  "rules": {
    "@typescript-eslint/naming-convention": [
      "error",
      { "selector": "default", "format": ["camelCase"] },
      { "selector": "typeLike", "format": ["PascalCase"] }
    ],
    "semi": "off",
    "@typescript-eslint/semi": ["error", "never"],
    "block-scoped-var": "error",
    "no-var": "error",
    "indent": [2, 2],
    "prefer-const": "error",
    "prefer-arrow-callback": "error",
    "quotes": ["warn", "single", { "avoidEscape": true }],
    "no-trailing-spaces": "error",
    "eol-last": "error",
    "eqeqeq": "error"
  },
  "overrides": [
    {
      "files": ["**/*.ts", "**/*.tsx"],
      "parser": "@typescript-eslint/parser",
      "extends": [
        "plugin:@typescript-eslint/recommended"
      ],
      "rules": {
        "@typescript-eslint/no-non-null-assertion": "off",
        "@typescript-eslint/no-use-before-define": "off",
        "@typescript-eslint/no-warning-comments": "off",
        "@typescript-eslint/no-empty-function": "off",
        "@typescript-eslint/no-var-requires": "off",
        "@typescript-eslint/explicit-function-return-type": "off",
        "@typescript-eslint/explicit-module-boundary-types": "off",
        "@typescript-eslint/ban-types": "off",
        "node/no-missing-import": "off",
        "node/no-empty-function": "off",
        "node/no-unsupported-features/es-syntax": "off",
        "node/no-missing-require": "off",
        "node/shebang": "off",
        "no-dupe-class-members": "off",
        "require-atomic-updates": "off"
      },
      "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
      }
    }
  ]
}