Worked on the cognitedata/reveal repository to enhance the HtmlOverlayTool by implementing a cluster DOM element caching mechanism using TypeScript and JavaScript. This approach enabled the reuse of composite DOM nodes when overlay composition remained unchanged, reducing unnecessary DOM manipulations and improving click event reliability. The solution addressed issues with lost click events and visual flicker by introducing a stable cache keyed by overlay element IDs. Added comprehensive tests to verify caching behavior and ensure regression safety, while refining cache invalidation and cleanup logic. Focused on front end development and testing, the work improved maintainability and user interaction stability.