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typelab / assertions / IsFunction

type IsFunction<T> = _IsTrue<IfFunction<T, true, false>>;

Checks if a given type T is a function type.

Type Parameters

Type Parameter Description

T

The type to be checked.

Returns

true if T is a function type, false otherwise.

Example

type Valid = IsFunction<() => string>; // true
type Invalid = IsFunction<string>; // false