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# MVI: Minimum Viable Interface for React Components

Stop building highly flexible React components for specific business needs. The Minimum Viable Interface restricts props and eliminates impossible states to drastically improve long-term maintainability.

- **Speakers:** [Daniel Espino Garcia](https://www.wearedevelopers.com/@daniel-espino-garcia)
- **Event:** World Congress 2025
- **Published:** August 20, 2025
- **Duration:** 21:09
- **URL:** https://www.wearedevelopers.com/videos/1670-mvi-minimum-viable-interface-for-react-components

## Summary

The Minimum Viable Interface (MVI) philosophy for React components emphasizes designing APIs strictly for specific business needs rather than general-purpose reuse. Drawing from experiences maintaining a decade-old codebase at Mattermost, this approach highlights the critical distinction between library code and business code. While third-party libraries require massive flexibility and hundreds of props to accommodate unknown use cases, business components should restrict their interfaces to reduce cognitive load and simplify testing. By wrapping external libraries and exposing only the necessary subset of functionality, development teams can prevent scope creep, seamlessly refactor internal logic, and protect against upstream breaking changes. Adopting MVI relies on a strict adherence to the YAGNI (You Aren't Gonna Need It) principle to avoid building speculative features. The methodology champions restricting prop types: booleans and enums are preferred to constrain options, while arbitrary strings, numbers, and custom class names are discouraged to prevent undocumented behaviors and rogue UI variations. Furthermore, passing React elements as props is minimized to keep rendering responsibilities centralized. A critical takeaway is the elimination of impossible states by replacing overlapping booleans with strongly typed unions. Although this restrictive design forces developers to think deeply before expanding an API, the upfront friction significantly improves long-term maintainability, ensures UI consistency, and even optimizes components for AI-assisted coding by limiting ambiguous decision branches.

**Keywords:** react component architecture, minimum viable interface, component props design, business vs library code, third-party library wrappers, preventing impossible states, typescript union types, YAGNI principle, frontend cognitive load, react UI refactoring, strict prop typing, custom component wrappers, frontend technical debt, AI-assisted coding, mattermost frontend architecture

## Chapters

1. **Origin and philosophy of the minimum viable interface** (00:05) — Applying strict minimal component interfaces to business code rather than generic library patterns.
1. **Benefits of reducing cognitive load and limiting props** (02:19) — How fewer component props improve readability, facilitate testing, and simplify AI code generation.
1. **Defining the interface of React components** (04:21) — Treating props, context, and state as the core communication boundaries of a component.
1. **Contrasting library code flexibility with strict business code** (05:57) — Why business applications should aggressively restrict component options compared to open-source UI libraries.
1. **Applying the yagni principle to component properties** (08:43) — Avoiding speculative features and exposing only the functionality required by current business needs.
1. **Using booleans and enums over open-ended styling props** (10:19) — Restricting component variations by replacing arbitrary strings, class names, and React elements with strictly typed booleans or enums.
1. **Wrapping external libraries to control component APIs** (15:10) — Encapsulating third-party dependencies within custom wrapper components to simplify maintenance and prevent unauthorized prop usage.
1. **Preventing impossible states in component configurations** (17:18) — Utilizing union types to enforce logical constraints and eliminate contradictory combinations of component properties.
1. **Managing business changes and strict interface trade-offs** (18:34) — Navigating the friction of updating deliberately constrained component interfaces when new product requirements emerge.

## Related Moments

- [Designing flexible and reusable component APIs](https://www.wearedevelopers.com/videos/975-leveraging-storybook-for-component-driven-development-outside-of-your-classic-component-library) (from "Leveraging Storybook for Component Driven Development outside of your classic Component Library.")
- [Combining clean architecture and MVVM in React](https://www.wearedevelopers.com/videos/1997-developing-a-clean-architecture-inspired-react-application-with-mvvm) (from "Developing a clean architecture-inspired React application with MVVM")
- [Fundamentals of building interfaces with React](https://www.wearedevelopers.com/videos/100-react-and-the-power-of-visualisation) (from "React and the power of visualisation")
- [Constructing basic UI components using React hooks](https://www.wearedevelopers.com/videos/1466-building-better-apps-with-react-native) (from "Building Better Apps with React Native")
- [The rise of modern component-based frameworks and modular architecture](https://www.wearedevelopers.com/videos/118-how-to-stop-choosing-javascript-frameworks-and-start-living) (from "How to Stop Choosing JavaScript Frameworks and Start Living")
- [Summarizing modern patterns for robust interactive components](https://www.wearedevelopers.com/videos/1589-building-interactive-async-ui-with-react-19-and-ariakit) (from "Building Interactive Async UI with React 19 and Ariakit")

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