.eslintrc.json

{
  "root": true,
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "env": {
    "browser": true,
    "commonjs": true,
    "es6": true,
    "amd": true
  },
  "parserOptions": {
    "ecmaVersion": 9,
    "ecmaFeatures": {
      "ecmaVersion": 2018
    },
    "sourceType": "module"
  },
  "rules": {
    "indent": ["error", 2],
    "keyword-spacing": "error",
    "linebreak-style": ["error", "unix"],
    "no-undef": 0,
    "no-unsued-vars": 0,
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "space-before-blocks": "error",
    "space-before-function-paren": "error",
    "@typescript-eslint/no-namespace": "off"
  }
}