.eslintrc

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "es2020": true
  },
  "globals": {
    "jsdom": true,
    "jsSDK": true
  },
  "parser": "@babel/eslint-parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "plugins": ["react", "babel"],
  "extends": ["eslint:recommended", "plugin:react/recommended", "prettier"],
  "settings": {
    "react": {
      "version": "16.14"
    }
  },
  "rules": {
    // Possible Errors
    "no-misleading-character-class": "error",
    "no-template-curly-in-string": "error",
    "no-console": "warn",
    // Best practices
    "array-callback-return": "error",
    "consistent-return": "error",
    "default-case": "error",
    "eqeqeq": "error",
    "no-eq-null": "error",
    "no-param-reassign": "error",
    "no-return-assign": "error",
    "no-return-await": "error",
    "babel/no-unused-expressions": "error",
    "require-await": "error",
    "radix": "error",
    // Variables
    "no-unused-vars": [
      "error",
      {
        "argsIgnorePattern": "^_",
        "varsIgnorePattern": "^_"
      }
    ],
    "no-shadow-restricted-names": "error",
    // Stylistic issues
    "no-nested-ternary": "error",
    "spaced-comment": [
      "error",
      "always",
      {
        "exceptions": ["-"]
      }
    ],
    // ECMAScript 6
    "arrow-body-style": ["error", "as-needed"],
    "no-duplicate-imports": "error",
    "no-var": "error",
    "prefer-const": [
      "error",
      {
        "destructuring": "all"
      }
    ],
    "prefer-template": "error",
    "template-curly-spacing": "off",
    // React
    "react/prop-types": "off",
    "react/no-unescaped-entities": "off",
    "no-import-assign": "warn"
  },
  "overrides": [
    {
      // https://typescript-eslint.io/docs/linting/troubleshooting/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
      "files": ["*.ts", "*.mts", "*.cts", "*.tsx"],
      "rules": {
        "no-undef": "off"
      }
    },
    {
      "files": ["src/**/*.ts", "src/**/*.tsx"],
      "excludedFiles": [
        "src/components/ui/**/*.ts",
        "src/components/ui/**/*.tsx"
      ],
      "parser": "@typescript-eslint/parser",
      "parserOptions": {
        "ecmaFeatures": {
          "jsx": true,
          "modules": true
        },
        "sourceType": "module",
        "project": "./tsconfig.json",
        "createDefaultProgram": true
      },
      "plugins": ["@typescript-eslint", "react", "babel"],
      "extends": [
        "eslint:recommended",
        "plugin:react/recommended",
        "plugin:@typescript-eslint/eslint-recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking"
      ],
      "rules": {
        "@typescript-eslint/no-floating-promises": "warn",
        "@typescript-eslint/no-unsafe-assignment": "warn",
        "@typescript-eslint/no-unsafe-member-access": "warn",
        "@typescript-eslint/no-unsafe-call": "warn",
        "@typescript-eslint/no-misused-promises": "warn",
        "@typescript-eslint/no-unused-vars": [
          "error",
          {
            "argsIgnorePattern": "^_",
            "varsIgnorePattern": "^_"
          }
        ]
      }
    }
  ]
}