Brandon Guest refactored the ToggleButton component for the electricitymaps-contrib repository, focusing on improving the reliability and maintainability of map controls and panel toggles. Using React and TypeScript, Brandon simplified the logic for option checks, introduced support for string enums, and corrected selection and deselection handling. This targeted update reduced UI edge-case issues, resulting in more stable and predictable user interactions. The refactor also enhanced the component’s reusability and testability, laying groundwork for future UI enhancements. By clarifying control patterns and leveraging modern frontend development practices, Brandon delivered a robust solution that streamlines ongoing feature development and maintenance.