<ul><li>The article discusses building a composable, type-safe state machine library in TypeScript and demonstrates its usage in a UI flow.</li><li>It covers defining generic types for states, events, and transitions and creating a builder to register states and transitions.</li><li>The use of advanced TypeScript features like discriminated unions for states and events ensures compile-time error checking and guard checks allow for conditional transitions.</li><li>The importance of unit testing, error-recovery transitions, and the use of XState for advanced features like visualization tools and hierarchical states is also highlighted in the article.</li></ul>

Composable State Machines in TypeScript: Type-Safe, Predictable, and Testable

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