.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint", "import", "prettier"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:import/errors",
    "plugin:import/warnings",
    "prettier"
  ],
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "rules": {
    "import/no-cycle": ["error", { "maxDepth": "∞" }],
    "prettier/prettier": "error",
    "no-restricted-syntax": [
      "error",
      {
        "selector": "ImportDeclaration[source.value=/^\\./][source.value!=/\\.(c|m)?(js(on(c)?)?|ts)$/]",
        "message": "Local imports must have the explicit extension"
      }
    ],
    "max-len": [
      "error",
      {
        "code": 80,
        "ignoreComments": true,
        "ignoreTrailingComments": true,
        "ignoreUrls": true,
        "ignoreStrings": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ],
    "eol-last": ["error", "always"],
    "import/no-default-export": "error",
    "eqeqeq": [2, "always"],
    "no-var": 2,
    "block-scoped-var": 2,
    "no-async-promise-executor": "off",
    "no-bitwise": [2, { "allow": ["~"] }],
    "no-duplicate-imports": [2, { "includeExports": true }],
    "no-eq-null": 2,
    "no-multiple-empty-lines": [2, { "max": 1, "maxEOF": 0 }],
    "no-template-curly-in-string": 2,
    "no-unneeded-ternary": 2,
    "quote-props": [2, "as-needed"],
    "require-await": 2,
    "rest-spread-spacing": [2, "never"],
    "semi-spacing": 2,
    "space-before-function-paren": [
      2,
      { "anonymous": "always", "named": "never", "asyncArrow": "always" }
    ],
    "space-unary-ops": 2,
    "yoda": 2,
    "no-const-assign": 2,
    "no-extra-semi": 2,
    "for-direction": 2,
    "no-eval": 2,
    "no-empty": ["error", { "allowEmptyCatch": true }]
  },
  "env": {
    "browser": false,
    "node": true
  },
  "overrides": [
    {
      "files": ["*.ts"],
      "rules": {
        "@typescript-eslint/semi": ["error", "always"],
        // "@typescript-eslint/quotes": [
        //   "error",
        //   "single",
        //   { "avoidEscape": true, "allowTemplateLiterals": true }
        // ],
        "@typescript-eslint/no-empty-function": [
          "error",
          { "allow": ["arrowFunctions"] }
        ]
      }
    },
    {
      "files": ["*.js"],
      "parserOptions": {
        "project": null
      },
      "rules": {
        "semi": ["error", "always"],
        "quotes": [
          "error",
          "single",
          { "avoidEscape": true, "allowTemplateLiterals": true }
        ],
        "no-unused-vars": 2
      }
    }
  ],
  "settings": {
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true,
        "extensions": [".js", ".ts"]
      }
    }
  }
}