18 мая 2022 г. · I want to use default for generic, because a controller might not have any request body. Given unknown and undefined would violate the ...

13 июл. 2021 г. · It allows you to have a consistent return type, and perform "optional logic" (i.e. "do this if the value exists, that if it doesn't"; or "use ...

16 июн. 2022 г. · I want to have multiple different versions of the express Request, each with some additional properties in the Request object added by the middleware.

2 мар. 2022 г. · Why are default *type* parameters for generics acceptable but not default parameters for functions? This seems like a pointless inconsistency. I ...

5 июн. 2024 г. · The reason you can't assign the default value of the parameter is because it is possible for the generic type to be something that the default ...

21 февр. 2024 г. · In the first case, TS replaces unknown with boolean, it wasn't intended, is there any workaround to prevent this? In the second case, TS doesn't ...

29 июн. 2022 г. · I changed the name of the type in the post to clarify. DogOrNull specifies a kind of optional Dog based on the generic.

23 янв. 2023 г. · I want the constructor to help determine what the generic parameter "Key" is, but I want "Key" to be defaulted to null if the user doesn't use the key argument.

31 мая 2024 г. · You give a default to the `TKey` parameter, but no type constraint. Try adding a type constraint to `TKey` - this seems to work in the ...

17 февр. 2023 г. · Based on the documentation, using extends does constrain the allowed types for a generic. You can also use = to define a default type for a ...