FrontendHaltTypeScript·Intermediate·Coding·1 min read
When is a generic type parameter unnecessary?
Short interview answer
If it appears only once and does not connect inputs, outputs, or members, it may add ceremony without information. Use the concrete constraint type or unknown instead. Type parameters should model a real relationship.
Example
// Pointless generic — T is used once, connects nothingfunction log<T>(x: T): void { console.log(x); }// Just: function log(x: unknown): voidKey takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.