.eslintrc.json

{
  "root": true,
  "extends": [
    "airbnb-base",
    "airbnb-typescript/base",
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "plugin:cypress/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "plugins": ["@typescript-eslint", "cypress"],
  "rules": {
    "@typescript-eslint/array-type": ["error", { "default": "array-simple" }],
    "@typescript-eslint/await-thenable": "error",
    "@typescript-eslint/explicit-function-return-type": "off",
    "@typescript-eslint/explicit-module-boundary-types": "off",
    "@typescript-eslint/naming-convention": [
      "error",
      {
        "selector": "default",
        "format": ["camelCase"],
        "leadingUnderscore": "allow"
      },
      {
        "selector": "variable",
        "format": ["camelCase", "UPPER_CASE"]
      },
      {
        "selector": ["typeLike", "enumMember"],
        "format": ["PascalCase"]
      },
      {
        "selector": ["objectLiteralProperty"],
        "format": null
      }
    ],
    "@typescript-eslint/no-base-to-string": "error",
    "@typescript-eslint/no-extra-non-null-assertion": "error",
    "@typescript-eslint/no-floating-promises": "error",
    "@typescript-eslint/no-namespace": "error",
    "@typescript-eslint/no-non-null-assertion": "error",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "argsIgnorePattern": "^_",
        "varsIgnorePattern": "^_"
      }
    ],
    "@typescript-eslint/no-use-before-define": [
      "error",
      {
        "classes": false,
        "functions": false
      }
    ],
    "@typescript-eslint/prefer-interface": "off",
    "@typescript-eslint/prefer-nullish-coalescing": ["warn"],
    "@typescript-eslint/prefer-optional-chain": "error",
    "@typescript-eslint/prefer-string-starts-ends-with": "error",
    "@typescript-eslint/promise-function-async": "error",
    "import/prefer-default-export": "off",
    "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }],
    "no-sequences": "error",
    "no-underscore-dangle": "off",
    "no-use-before-define": ["error", { "classes": false, "functions": false }],
    "cypress/no-unnecessary-waiting": "warn"
  },
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  }
}