.eslintrc.json

{
  "extends": [
    "plugin:import/typescript", // this is needed because airbnb uses eslint-plugin-import
    "prettier",
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "plugins": ["@typescript-eslint"],
  "env": {
    "browser": true,
    "node": true,
    "mocha": true,
    "jest": true
  },
  "globals": {
    "cy": true,
    "Cypress": true,
    "JSX": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": "latest",
    "sourceType": "module",
    "tsconfig": "tsconfig.eslint.json"
  },
  "rules": {
    "import/extensions": "off",
    "react/jsx-uses-react": "off",
    "react/react-in-jsx-scope": "off",
    // note you must disable the base rule as it can report incorrect errors
    "no-use-before-define": "off",
    "@typescript-eslint/no-use-before-define": ["error"],
    // remove when possible
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/explicit-module-boundary-types": [
      "error",
      { "allowHigherOrderFunctions": true }
    ],
    "import/no-named-as-default": 0,
    "no-restricted-syntax": "off",
    "no-console": [1, { "allow": ["error", "debug"] }],
    "react/prop-types": "off", // Since we do not use prop-types
    "react/require-default-props": "off" // Since we do not use prop-types
  },
  "overrides": [
    {
      // enable the rule specifically for TypeScript files
      "files": ["*.ts", "*.tsx"],
      "rules": {
        "@typescript-eslint/explicit-module-boundary-types": [
          "error",
          { "allowHigherOrderFunctions": true }
        ]
      }
    },
    {
      // enable the rule specifically for src files
      "files": ["src/**/*.js", "src/**/*.tsx", "src/**/*.ts"],
      "rules": {
        "no-restricted-syntax": ["error"]
      }
    },
    {
      // disable rules for JavaScript files
      "files": ["src/**/*.js"],
      "rules": { "@typescript-eslint/explicit-module-boundary-types": "off" }
    }
  ],
  "settings": {
    "import/extensions": [".js", ".jsx", ".ts", ".tsx"],
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true
      },
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  }
}