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any ↔ (default) untyped anonymous Type, can be literally anything

aka Anonymous-Type

any is bad because TSC is unable to do any type-checking

References​

  1. unknown ↔ Top Type to rep any value but also make it illegal to use (w/o Narrow)

  2. "noImplicitAny": true ↔ to throw Exception when any Parameter inferred as any

  3. Array ↔ ordered sequence of elements of any type (Primitive || Object)

  4. Function Type ↔ Type to annotate Methods & Callback Function with implicit return of any