.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint", "prettier"],
  "env": {
    "browser": true,
    "es6": true
  },
  "rules": {
    "no-console": [
      "error",
      {
        "allow": ["warn", "error"]
      }
    ],
    "multiline-ternary": "off",
    "no-unused-vars": "off",
    "no-shadow": "warn",
    "quotes": ["warn", "single"],
    "no-var": "error",
    "@typescript-eslint/no-unused-vars": "error",
    "no-useless-constructor": "off",
    "@typescript-eslint/no-useless-constructor": "error",
    "max-len": [
      "warn",
      {
        "code": 80,
        "tabWidth": 2,
        "comments": 120,
        "ignoreComments": false,
        "ignoreTrailingComments": true,
        "ignoreUrls": true,
        "ignoreStrings": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ]
  }
}