.eslintrc.json

{
    "extends": ["eslint:recommended", "plugin:prettier/recommended"],
    "parserOptions": {
      "ecmaVersion": 12,
      "sourceType": "module",
      "ecmaFeatures": {
        "jsx": true
      }
    },
    "plugins": ["jest"],
    "rules": {
      "no-var": 2,
      "prefer-arrow-callback": 2
    },
    "overrides": [
      {
        "files": ["*.ts", "*.tsx"],
        "parser": "@typescript-eslint/parser",
        "plugins": ["@typescript-eslint"],
        "extends": ["plugin:@typescript-eslint/recommended"],
        "rules": {
          "@typescript-eslint/ban-ts-comment": 0,
          "@typescript-eslint/ban-types": 1,
          "@typescript-eslint/no-empty-function": 1,
          "@typescript-eslint/member-ordering": 1,
          "@typescript-eslint/explicit-member-accessibility": [
            1,
            {
              "accessibility": "explicit",
              "overrides": {
                "accessors": "explicit",
                "constructors": "no-public",
                "methods": "explicit",
                "properties": "explicit",
                "parameterProperties": "explicit"
              }
            }
          ]
        }
      }
    ],
    "env": {
      "browser": true,
      "node": true,
      "es6": true,
      "jest/globals": true
    },
    "globals": { "google": "readonly" }
  }