.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint",
    "import"
  ],
  "extends": [
    "semistandard",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "settings": {
    "import/extensions": [
      ".js",
      ".jsx",
      ".ts",
      ".tsx"
    ],
    "import/parsers": {
      "@typescript-eslint/parser": [
        ".ts",
        ".tsx"
      ]
    },
    "import/resolver": {
      "node": {
        "extensions": [
          ".js",
          ".jsx",
          ".ts",
          ".tsx"
        ]
      },
      "typescript": {
        "alwaysTryTypes": true
      }
    }
  },
  "rules": {
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "ts": "never"
      }
    ],
    "@typescript-eslint/no-unused-vars": [
      "warn",
      {
        "argsIgnorePattern": "_.*"
      }
    ]
  }
}