.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 2020
  },
  "extends": [
    "airbnb-base",
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "plugin:prettier/recommended",
    "plugin:import/recommended",
    "plugin:promise/recommended"
  ],
  "plugins": [
    "@typescript-eslint",
    "prettier",
    "promise",
    "import"
  ],
  "env": {
    "node": true,
    "es6": true,
    "mocha": true
  },
  "rules": {
    "no-console": "off",
    "no-restricted-syntax": "off",
    "max-classes-per-file": "off",
    "class-methods-use-this": "off",
    "no-unused-expressions": "off",
    "comma-dangle": [
      "error",
      "never"
    ],
    "@typescript-eslint/explicit-function-return-type": [
      "error",
      {
        "allowExpressions": true
      }
    ],
    "import/prefer-default-export": "off",
    "prefer-destructuring": [
      "error",
      {
        "array": false
      }
    ],
    "import/first": "off",
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "mjs": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never"
      }
    ],
    "import/newline-after-import": "off",
    "@typescript-eslint/no-use-before-define": "off",
    "@typescript-eslint/camelcase": "off",
    "@typescript-eslint/interface-name-prefix": "off",
    "@typescript-eslint/no-var-requires": "warn"
  },
  // Needed for eslint-plugin-import to correctly detect .ts files
  "settings": {
    "import/extensions": [
      ".js",
      ".jsx",
      ".ts",
      ".tsx"
    ],
    "import/parsers": {
      "@typescript-eslint/parser": [
        ".ts",
        ".tsx"
      ]
    },
    "import/resolver": {
      "node": {
        "extensions": [
          ".js",
          ".jsx",
          ".ts",
          ".tsx"
        ]
      }
    }
  }
}