How to refer to Typescript enum in d.ts file, when using AMD?

Question

I want to define a typescript interface to represent, say, an error. Something like this:

enum MessageLevel {
    Unknown,
    Fatal,
    Critical,
    Erro         


        

Answer 1

Almost two years later, this problem still exists. I could not find a good solution so I created a workaround, which tells your interface only that the type of the var is an enum, but not which enum. There's a "middleware" abstract wrapper for your main class which concretely sets the var type to be the needed enum.

// globals.d.ts

type EnumType = { [s: any]: any }

interface IMyMessage {
  level: EnumType
}

// enums.ts

export enum MessageLevel {
    Unknown,
    Fatal,
    Critical,
    Error,
    Warning,
    Info,
    Debug
}

// MyClass.ts

import { MessageLevel } from 'enums'

// If your MyMessage class is extending something, MyMessageWrapper has to 
//  extend it instead!
abstract class MyMessageWrapper extends X implements IMyMessage {
  abstract level: MessageLevel
}

class MyMessage extends MyMessageWrapper {
  level = MessageLevel.Unknown // works
  // level = MyOtherEnum.Unknown // doesn't work
}

Might be useful in some use cases.