During October 2024, Mutter45 enhanced the bkeepers/vueuse repository by implementing function-based initial value support for the useArrayReduce composable. This work involved updating the composable to accept a function as the initial value, invoking it appropriately to enable dynamic initialization. Mutter45 ensured backward compatibility and improved API flexibility, which reduces edge-case bugs and streamlines onboarding for developers using Vue.js. The solution was delivered with comprehensive tests in JavaScript and TypeScript, verifying correct behavior and preventing regressions. By focusing on composables and frontend development, Mutter45 delivered a robust, low-surface-area change that broadened the API’s coverage and reliability for consumers.