I am trying to define an enum like:
enum retailers {
STOREA = { label: "Amazon", value: "amazon" };
STOREB = { label: "Walmart", value: "walmart" };
}
However, I encountered the following error message:
Type '{ label: string; value: string; }' is not assignable to type 'retailers'.ts(2322)
Does anyone know if this is possible in typescript?
Notably, in TypeScript, an enum can only accept string or numeric values:
enum Stores {
STOREA = "amazon",
STOREB = "walmart"
}
However, if the functionality of an enum is not necessary, a similar approach with object values can be implemented as demonstrated below:
const Stores = {
STOREA: { label: "Amazon", value: "amazon" },
STOREB: { label: "Walmart", value: "walmart" }
} as const;
type Stores = typeof Stores[keyof typeof Stores];
namespace Stores {
export type STOREA = typeof Stores.STOREA;
export type STOREB = typeof Stores.STOREB;
}
In this structure, there exist three representations of Stores:
STOREA and STOREB, each holding object values.Stores object.This implementation allows for emulating typical enum behavior:
interface Foo {
store: Stores; // utilizing the type here
}
interface AmazonFoo extends Foo {
store: Stores.STOREA; // utilizing the namespace here
}
const foo: Foo = { store: Stores.STOREB }; // utilizing the value here
const amFoo: AmazonFoo = { store: Stores.STOREA }; // utilizing the value here
The compatibility of these uses applies to both versions of Stores. Depending on specific requirements, certain features like the namespace may be omitted. The primary focus should align with actual use cases.
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