Worked on the NervJS/taro repository to address a critical issue affecting mini-app styling, focusing on stability and consistency across builds. Using TypeScript, Node, and React, implemented boundary condition checks within the Vite-based compilation pipeline to ensure that shared and custom component styles are always emitted, even when app.css is empty. This fix resolved visual regressions caused by missing styles when reusing components in mini-apps. The solution included updating and expanding test coverage, particularly for picker-view snapshots, to prevent future regressions. Collaborated cross-team to deliver a robust bug fix, contributing to ongoing improvements in mini-app development workflows.