Optional chaining in JavaScript provides a more elegant and safer way to access deeply nested properties, reducing the risk of runtime errors associated with undefined or null values. This feature simplifies code by eliminating the need for verbose checks and can be particularly beneficial in API responses and component-based frameworks like React. However, developers should be aware of its limitations to avoid masking potential bugs.

The Anthropic Ruby library offers easy integration with the Anthropic REST API for Ruby applications version 3.2.0 and above. It includes features like streaming responses, error handling, and support for file uploads while providing comprehensive documentation and types for enhanced usability. Users can install it via Bundler and utilize various configurations for requests and error handling.