Un used variable is emmitted while transpiling enums.

TypeScript code

module Workspace {
  export enum State {
    IN_PROGRESS,
    BUFFER_RENDERED,
    SKIPPED,
    TIME_OUT
  }
}

Compled JavaScript Code.

 
var Workspace;
(function (Workspace) {
    (function (State) {
        State[State["IN_PROGRESS"] = 0] = "IN_PROGRESS";
        State[State["BUFFER_RENDERED"] = 1] = "BUFFER_RENDERED";
        State[State["SKIPPED"] = 2] = "SKIPPED";
        State[State["TIME_OUT"] = 3] = "TIME_OUT";
    })(Workspace.State || (Workspace.State = {}));
    var State = Workspace.State; // this code is use no where.
})(Workspace || (Workspace = {}));

I am using TypeScript version 1.5.3

Reproduce el ejemplo de enum con TypeScript 1.5.3 y compara el JavaScript generado con el informe. Sigue la ruta de transpilación de enum que emite la variable State no utilizada; se considera terminado cuando la variable no utilizada equivalente ya no se emite sin cambiar el comportamiento del enum.