.eslintrc.json

{
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended" // TypeScript rules
  ],
  "root": true,
  "env": { "browser": false },
  "plugins": ["prettier", "simple-import-sort"],
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true
    }
  },
  "rules": {
    "prettier/prettier": "error",

    // Auto-sort imports
    "sort-imports": "off",
    "import/order": "off",
    "simple-import-sort/imports": "error",
    "simple-import-sort/exports": "error",

    // Custom preferences
    "import/prefer-default-export": "off",
    "no-bitwise": "off",
    "no-plusplus": "off",

    /* Typescript */
    "arrow-body-style": ["off"],
    "@typescript-eslint/no-explicit-any": "off",

    // This rule is not compatible with Next.js's <Link /> components
    "jsx-a11y/anchor-is-valid": "off",

    // Why would you want unused vars?
    "@typescript-eslint/no-unused-vars": ["error"],
    "@typescript-eslint/no-unused-vars-experimental": "error",
    "no-unused-vars": "off",

    // I suggest this setting for requiring return types on functions only where useful
    "@typescript-eslint/explicit-function-return-type": [
      "warn",
      {
        "allowExpressions": true,
        "allowConciseArrowFunctionExpressionsStartingWithVoid": true
      }
    ]
  }
}