Worked on the open-feature/js-sdk repository to deliver support for Angular 21, focusing on modernizing the SDK’s dependency management and ensuring compatibility with the latest Angular features. The approach involved updating core dependencies, including Angular and ESLint, and integrating @angular-eslint to align with current best practices. JavaScript and JSON were used extensively to implement and validate these changes, which addressed issue #1314 and improved overall stability. By streamlining the upgrade process and reducing maintenance overhead, the work enabled downstream applications to adopt Angular 21 more easily, resulting in a smoother transition and enhanced reliability for users of the SDK.