.eslintrc

{
  "root": true,
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 2017,
    "sourceType": "module"
  },
  "env": {
    "node": true,
    "browser": true
  },
  "rules": {
    "comma-dangle": [2, {
      "arrays": "always-multiline",
      "objects": "always-multiline",
    }],
    "curly": [2, "multi-line"],
    "new-cap": 0,
    "no-mixed-requires": 0,
    "no-trailing-spaces": 2,
    "no-underscore-dangle": 0,
    "no-use-before-define": [2, "nofunc"],
    "no-var": 2,
    "object-shorthand": 2,
    "prefer-arrow-callback": 2,
    "prefer-const": 2,
    "prefer-spread": 2,
    "quotes": 0
  },
  "overrides": [{
    "files": ["*.ts"],
    "parser": "@typescript-eslint/parser",
    "plugins": [
      "@typescript-eslint"
    ],
    "rules": {
      "no-undef": "off",
      "no-unused-vars": "off",
      "@typescript-eslint/no-unused-vars": "error",
      "no-redeclare": "off",
      "@typescript-eslint/no-redeclare": "error"
    }
  }]
}