extract generic type of generic class

177177177 · 2022-10-06T02:27:18.588Z

how to get typeof generic type in generic class ```ts class GenericClass {} ``` i want to extract type T i am using a library, it exports a generic class, but doesnt export the generic type that the generic class takes, and i want to extend the generic class, like this ```ts export class MyGenericClass > extends GenericClass {} ``` another example, ```ts class ExtendedClient extends Client {} ``` i want the generic type of `ExtendedClient` be the same as the generic type of `Client`. but i dont have access to generic type of `Client`, so thats why i want to extract it. so i can do ```ts class ExtendedClient > extends Client {} ```

how to get typeof generic type in generic class

class GenericClass<T> {}

class GenericClass<T> {}

i want to extract type T

i am using a library, it exports a generic class, but doesnt export the generic type that the generic class takes, and i want to extend the generic class, like this

export class MyGenericClass<T extends GenericClassTypeArgument<GenericClass>> extends GenericClass<T> {}

export class MyGenericClass<T extends GenericClassTypeArgument<GenericClass>> extends GenericClass<T> {}

another example,

class ExtendedClient<T> extends Client<T> {}

class ExtendedClient<T> extends Client<T> {}

i want the generic type of

ExtendedClient

ExtendedClient

be the same as the generic type of

Client

Client

. but i dont have access to generic type of

Client

Client

, so thats why i want to extract it.
so i can do

class ExtendedClient<T extends GenericTypeOf<Client>> extends Client<T> {}

class ExtendedClient<T extends GenericTypeOf<Client>> extends Client<T> {}

Deno•4y ago•

3 replies

177177177

extract generic type of generic class

how to get typeof generic type in generic class

class GenericClass<T> {}

class GenericClass<T> {}

i want to extract type T

i am using a library, it exports a generic class, but doesnt export the generic type that the generic class takes, and i want to extend the generic class, like this

export class MyGenericClass<T extends GenericClassTypeArgument<GenericClass>> extends GenericClass<T> {}

export class MyGenericClass<T extends GenericClassTypeArgument<GenericClass>> extends GenericClass<T> {}

another example,

class ExtendedClient<T> extends Client<T> {}

class ExtendedClient<T> extends Client<T> {}

i want the generic type of

ExtendedClient

ExtendedClient

be the same as the generic type of

Client

Client

. but i dont have access to generic type of

Client

Client

, so thats why i want to extract it.
so i can do

class ExtendedClient<T extends GenericTypeOf<Client>> extends Client<T> {}

class ExtendedClient<T extends GenericTypeOf<Client>> extends Client<T> {}

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