Worked on enhancing code quality and maintainability for the flowplayer/hls.js repository by implementing a custom ESLint rule to disallow for-of loops. This feature was introduced as a development dependency and configured to apply consistently across both the main project and its functional tests. The approach focused on enforcing uniform JavaScript coding standards, reducing potential risks associated with for-of usage, and streamlining onboarding for new contributors. Leveraging skills in ESLint configuration, JavaScript, and linting, the work addressed code consistency and maintainability. No major bugs were fixed during this period, with efforts concentrated on tooling and process improvements within the codebase.