Amazon Cognito Identity JavaScript SDK

The `amazon-cognito-identity-js` library is the dedicated JavaScript SDK for interacting directly with Amazon Cognito User Pools and Identity Pools. It enables client-side implementation of user registration, authentication, password management, and session handling without relying on a full backend. Currently at version 6.3.16, this library is actively maintained as part of the broader AWS Amplify monorepo, where its development is now integrated. While it provides low-level control over Cognito interactions, AWS encourages developers to consider the higher-level abstractions offered by AWS Amplify's `Auth` category (Amplify v6 and newer) for a more streamlined, tree-shakable, and modern developer experience. Updates are frequent, often bundled with Amplify releases. Its key differentiator is providing direct, granular access to Cognito's features for applications that require specific authentication flows or need to integrate with existing non-Amplify AWS SDK setups.