How can I find the defined type of a property/field at runtime in TypeScript?

[hoary stream]

I am trying to get the type of a property/field in TypeScript. Specifically, from the property decorator. The property does not have a value set so I can not derive it from the type of the value. Consider an example

class Example {
  abc: ABC
}

How would I get the class/class name of the property? To be specific, not the JavaScript 'primitive' type given by typeof x but the actual class(name), in this case ABC.

I've tried using reflect-metadata but it doesn't look like it's retaining the defined type in the metadata, running the following code:

console.log(Reflect.getMetadataKeys(target) + ", " + Reflect.getMetadata("design:type", target, propertyKey)

// -> ", undefined"

So it doesn't seem like there is any metadata relating to the type defined, or at all for that matter.

[lavish folio]

only decorated classes members get metadata

also note that decorator metadata is deprecated and will eventually be removed

there is no migration path, as far as I am aware

[hoary stream]

ill just pass in the type ig

the prototype

decorators wont get removed as a whole right?

[lavish folio]

there are two decorator specs, the old one works with decorator metadata it's labelled by "experimental", that one is getting removed

new decorators are unlikely to be removed and are not deprecated

[hoary stream]

are new decorators the ones with the ClassDecoratorContext

[lavish folio]

I'm not familiar with that type name

new decorators are enabled by default, and are disabled by the --experimentalDecorators flag

described here https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/#decorators

[hoary stream]

will this type of decorator get removed

[lavish folio]

the two different decorator proposals overlap somewhat

I believe that'll work in both