FrontendHaltTypeScript·Intermediate·Conceptual·1 min read
When can a large union become difficult to maintain?
Short interview answer
If unrelated concerns are multiplied into one union, combinations explode. Separate orthogonal state, nest smaller state machines, or model shared data outside the union while retaining genuine mutual exclusions.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.