Worked on the SuperMap/iClient-JavaScript repository, focusing on improving code quality and maintainability within the WebMapService.js module. Introduced a centralized constant for the 'ows:Identifier' value, replacing multiple duplicated string literals throughout the codebase. This internal refactor, implemented using JavaScript and front end development best practices, reduced the risk of typos and simplified future code changes without altering the public API. The approach ensured all existing tests continued to pass, aligning with established code quality standards. By eliminating duplication, the work lowered ongoing maintenance effort and contributed to a cleaner, more robust codebase for future development cycles.