Variadic Tuple Types: Type-Safe Spreads for Tuples
Variadic tuple types let you use spread syntax (`...`) inside tuple type definitions, just like you do with array values. This is crucial for typing functions that manipulate tuples, like `concat`, without writing endless overloads or losing type information.
Variadic tuple types let you use spread syntax (`...`) inside tuple type definitions, solving the old 'death by a thousand overloads' problem. They are essential for typing functions that manipulate tuples, like `concat` or `tail`, while preserving the exact types and order of all elements. The footgun is using a generic `T[]` when a variadic tuple would give you far more precise type safety for tuple-based operations.
Read the original → typescriptlang.org
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