.eslintrc.json

{
  "env": {
    "browser": true,
    "node": true,
    "jest": true,
    "es6": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 2018,
    "project": "./tsconfig.json"
  },
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:import/recommended",
    "plugin:import/typescript",
    "plugin:typescript-sort-keys/recommended"
  ],
  "plugins": [
    "@typescript-eslint/eslint-plugin",
    "eslint-plugin-import",
    "only-warn",
    "prefer-arrow",
    "simple-import-sort",
    "sort-destructure-keys",
    "typescript-sort-keys"
  ],
  "rules": {
    "@typescript-eslint/strict-boolean-expressions": [
      "warn",
      { "allowNullableObject": false, "allowNumber": false, "allowString": false }
    ],
    "arrow-parens": "warn",
    "comma-dangle": ["warn", "always-multiline"],
    "default-case-last": "warn",
    "eqeqeq": [
      "warn",
      "always",
      {
        "null": "never"
      }
    ],
    "implicit-arrow-linebreak": "warn",
    "import/newline-after-import": "warn",
    "max-len": ["warn", { "code": 120, "tabWidth": 2 }],
    "no-else-return": "warn",
    "no-use-before-define": "warn",
    "prefer-arrow/prefer-arrow-functions": "warn",
    "quotes": ["warn", "single", { "allowTemplateLiterals": true, "avoidEscape": true }],
    "simple-import-sort/exports": "warn",
    "simple-import-sort/imports": "warn",
    "sort-destructure-keys/sort-destructure-keys": "warn",
    "sort-keys": [
      "warn",
      "asc",
      {
        "allowLineSeparatedGroups": true,
        "caseSensitive": true,
        "natural": true
      }
    ],
    "sort-vars": ["warn", { "ignoreCase": true }]
  }
}