Subclassing Builtins

[abdel-17]

Describe the problem

JavaScript supports subclassing builtins like Array, but it seems Svelte doesn't proxy subclasses of Array. Yeah yeah, I know inheritance is disgusting and OOP is evil or whatever, but I have a valid use case where I need additional properties/methods on the array. I have an example below.

Example

Currently, I have a class with a current property that's an array, but it would be more convenient to have the class itself be an array.

Describe the proposed solution

Make $state work with subclasses of Array. Not sure if there are performance implications here.

Importance

nice to have

[webJose]

Svelte doesn't proxify class instances, which should cover subclasses of other classes. If you want a proxy, use a POJO.

[abdel-17]

I understand that. I feel like subclasses of Array can also be proxied though given that arrays are.