🟠 Immutable

Use this preset when you want the broader immutable baseline beyond recommended.

Config key

immutable.configs.immutable

Flat Config example

import immutable from "eslint-plugin-immutable-2";

export default [immutable.configs.immutable];

This preset keeps the targeted mutation guards from recommended and adds broader declaration and readonly typing discipline such as no-let, readonly-array, readonly-keyword, and warning-level no-method-signature, without the broader functional-style bans in functional-lite and functional.

Rules in this preset

• Fix legend:
  • 🔧 = autofixable
  • 💡 = suggestions available
  • — = report only

Rule	Fix
immutable-data	—
no-abort-controller-mutation	—
no-atomics-mutation	—
no-buffer-mutation	—
no-cache-api-mutation	—
no-cookie-mutation	—
no-data-view-mutation	—
no-date-mutation	—
no-dom-token-list-mutation	—
no-form-data-mutation	—
no-headers-mutation	—
no-history-mutation	—
no-let	💡
no-location-mutation	—
no-map-set-mutation	—
no-method-signature	💡
no-process-env-mutation	—
no-reflect-mutation	—
no-regexp-lastindex-mutation	—
no-stateful-regexp	—
no-storage-mutation	—
no-typed-array-mutation	—
no-url-mutation	—
no-url-search-params-mutation	—
readonly-array	🔧
readonly-keyword	🔧