.eslintrc.json

{
    "env": {
      "es6": true,
      "googleappsscript/googleappsscript": true
    },
    "extends": [
      "plugin:@typescript-eslint/recommended",
      "prettier"
    ],
    "plugins": [
      "@typescript-eslint",
      "googleappsscript",
      "prettier"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
      "ecmaVersion": 2019,
      "sourceType": "module",
      "project": "./tsconfig.json"
    },
    "rules": {
      "prettier/prettier": "error",
      "import/extensions": "off",
      "@typescript-eslint/explicit-function-return-type": "off",
      "@typescript-eslint/triple-slash-reference": "off",
      "@typescript-eslint/no-explicit-any": "off",
      "@typescript-eslint/naming-convention": [
        "error",
        {
          "selector": "property",
          "format": ["camelCase", "snake_case", "UPPER_CASE", "PascalCase"],
          "leadingUnderscore": "allow"
        }
      ],
      "no-unused-vars": "off",
      "@typescript-eslint/no-unused-vars": [
        "error"
      ],
      "no-useless-constructor": "off",
      "@typescript-eslint/no-useless-constructor": "error",
      "class-methods-use-this": "off"
    }
  }