.eslintrc.json

{
  "env": {
    "node": true,
    "browser": true
  },
  "extends": [
    "prettier",
    "eslint:recommended",
    "plugin:import/recommended",
    "plugin:import/typescript",
    "plugin:@typescript-eslint/recommended"
  ],
  "plugins": ["@typescript-eslint", "prettier", "import"],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "settings": {
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`
      }
    }
  },
  "rules": {
    "spaced-comment": "error",
    "quotes": ["error", "single"],
    "no-duplicate-imports": "error",
    "no-console": "warn",
    "no-unused-vars": ["warn", { "vars": "all", "args": "after-used", "ignoreRestSiblings": false }],
    "no-nested-ternary": "warn",
    "no-undef": "error"
  }
}