Let's dive into how UI component testing is approached today and how new tools released this year could simplify testing for the library authors.

When building product, you will reach a point where you need to implement a dropdown component. Dropdowns can take on many different shapes and forms, appearing as action lists, navigation menus, tooltips, or even autocomplete fields.

Dan Mall is a design system coach and consultant and he's been running a design system consultancy called SuperFriendly for over a decade, helping all types of companies to build their design systems and improve their team processes.

Atlassian’s end-to-end design language to create simple, intuitive and beautiful experiences. It's passing its 10 year mark at the time of interview and is developed to work across all Atlassian products.

Dimension is a design system built for Hologram products. At the time of interview, the team is moving towards the first stable release with a huge focus on working with the community from day zero.

Cerulean is a design system built and used in Amplitude. In Cerulean, code is used as a source of truth for the system and one of the team core challenges is around syncing code to their Figma libraries.

Blade is a cross-platform design system that powers Razorpay. All major features are implemented through API documents and decision logs to ensure the codebase works across React and React Native.

MUI offers a comprehensive suite of UI tools to help you ship new features faster. It started with a React library implementing Material guidelines and now also provides additional libraries like unstyled base components.

Primer is the design system powering Github products. It exists for more than 10 years now and it has gone a long way to scale from a css library to multi-framework solution.

NativeBase is a utility-first component library to build consistent UI across Android, iOS and Web. NativeBase is built upon React Native and was one of the first UI libraries for it.