CODEWITHSUNDEEP
typescript
Larry
Larry

Reputation: 29

How to understand this generic interface definition in TypeScript?

Does the definition of this Cache type, Cache<V = any>, define an object or a function?

Here the generic V, why specify an any? What does the equals sign mean?

export interface Cache<V = any> {
  value?: V;
  timeoutId?: ReturnType<typeof setTimeout>;
  time?: number;
  alive?: number;
}

Upvotes: 0

Views: 43

Answers (1)

Kan Robert
Kan Robert

Reputation: 299

Cache defines an object here. V = any means that V is of type any if no generic value is provided, and the value in this object is also of type any. The equal sign here means the default value.

Upvotes: 1

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