LifeSG/react-design-system
Feb 2025 – Apr 2026
2 Months active
Languages Used
CSSJavaScriptTypeScript
Technical Skills
Front End DevelopmentReactStyled ComponentsJavaScriptJestTypeScript
Jazsley Zainal
PROFILE
Jazsley Zainal
Over a two-month period, contributed to the LifeSG/react-design-system repository by delivering targeted improvements in both user interface and testing infrastructure. Enhanced the loading spinner component’s visual spacing using React, CSS, and Styled Components, resulting in improved layout consistency and user experience for consumer applications. Later, modernized the test infrastructure by upgrading to Jest 30, refining dependency management, and updating test typings with TypeScript to increase reliability and CI feedback. Addressed compatibility issues with jsdom and sinon, reducing test flakiness and accelerating feedback loops. The work demonstrated a focus on maintainable front end development and robust automated testing practices.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
2
Lines of code
3,307
Activity Months2
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Work History
April 2026
5 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — LifeSG/react-design-system: Delivered a comprehensive test-infrastructure modernization to achieve Jest 30 compatibility, improving reliability, typing, and CI feedback. The work reduced flaky tests, accelerated feedback loops, and strengthened test determinism, enabling safer and faster feature delivery.
5 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — LifeSG/react-design-system: Delivered a comprehensive test-infrastructure modernization to achieve Jest 30 compatibility, improving reliability, typing, and CI feedback. The work reduced flaky tests, accelerated feedback loops, and strengthened test determinism, enabling safer and faster feature delivery.
April 2026
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for LifeSG/react-design-system focusing on delivering a visual spacing enhancement for the Loading Spinner to improve UX and layout consistency. No major bugs fixed this month. Impact includes improved visual alignment, reduced layout drift, and faster iteration for consumer apps adopting the design system. Technologies demonstrated include React-based components, CSS spacing tokens, and design-system governance.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for LifeSG/react-design-system focusing on delivering a visual spacing enhancement for the Loading Spinner to improve UX and layout consistency. No major bugs fixed this month. Impact includes improved visual alignment, reduced layout drift, and faster iteration for consumer apps adopting the design system. Technologies demonstrated include React-based components, CSS spacing tokens, and design-system governance.
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
CSSJavaScriptTypeScript
Technical Skills
Front End DevelopmentJavaScriptJestReactStyled ComponentsTypeScriptdependency managementfront end developmenttesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline