interface type Array #Īn Array type literal consists of the element type followed by. Ways of typing Arrays # Array role “list”: array type literals vs. TypeScript accommodates these two roles by offering various ways of typing arrays. The elements do not necessarily have the same type. Tuple: The length of the Array is fixed.Lists: All elements have the same type.const assertions for Arrays and type inferenceĪrrays are used in the following two roles in JavaScript (and sometimes a mix of the two):.Type inference for empty Array literals.Type inference for non-empty Array literals.Pitfall: type inference doesn’t always get Array types right. ![]() Objects that are also Array-ish: interfaces with index signatures.Array role “tuple”: tuple type literals.Array role “list”: array type literals vs.In this blog post, we examine how Arrays can be typed in TypeScript.
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