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Now I am sure the issue is because there is a d.ts file included which contains a module called "Shared", and a require statement which includes a variable of the same name if it is being used in a NodeJS environment.

// shared.d.ts
declare module Shared { ... }

// other_module.ts
/// <reference path="shared.d.ts"/>
if(require) { var Shared = require("shared"); }
export class Something {
    public someVar = new Shared.SomethingElse("blah");
}

So when I pile other_module.ts (which is actually a lot of separate files), it tells me Shared is a duplicate identifier, which I can understand as TS thinks Shared is a module, but then is being told it is the return of require.

The problem here is that the output of modules need to be patible with nodeJS's require system, so in this case when other_module is required it will be in its own scope and will not know about Shared.SomethingElse so the require is needed so the internal modules in other_module will be able to access the Shared library, but in the browser environment it would get Shared.SomethingElse via the global scope.

If I remove the reference then the file wont pile as it doesn't know about Shared, if I remove the require when the module is loaded into nodejs (var otherModule = require("other_module")) it will plain that it doesn't know about Shared. So is there a way to solve this?

Now I am sure the issue is because there is a d.ts file included which contains a module called "Shared", and a require statement which includes a variable of the same name if it is being used in a NodeJS environment.

// shared.d.ts
declare module Shared { ... }

// other_module.ts
/// <reference path="shared.d.ts"/>
if(require) { var Shared = require("shared"); }
export class Something {
    public someVar = new Shared.SomethingElse("blah");
}

So when I pile other_module.ts (which is actually a lot of separate files), it tells me Shared is a duplicate identifier, which I can understand as TS thinks Shared is a module, but then is being told it is the return of require.

The problem here is that the output of modules need to be patible with nodeJS's require system, so in this case when other_module is required it will be in its own scope and will not know about Shared.SomethingElse so the require is needed so the internal modules in other_module will be able to access the Shared library, but in the browser environment it would get Shared.SomethingElse via the global scope.

If I remove the reference then the file wont pile as it doesn't know about Shared, if I remove the require when the module is loaded into nodejs (var otherModule = require("other_module")) it will plain that it doesn't know about Shared. So is there a way to solve this?

• javascript
• node.js
• typescript
• tsc

Share Improve this question Follow asked Jun 21, 2014 at 10:34 GrofitGrofit 18.5k2525 gold badges103103 silver badges187187 bronze badges

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1 Answer 1

Sorted by: Reset to default 6

First the error

Duplicate identifier because you have Shared in shared.d.ts + in other_module.ts.

FIX A, be all external

If you want to use amd / monjs ie. external modules, you need to use import/require (not var/require like you are doing). Using an import creates a new variable declaration space and therefore you are no longer polluting the global namespace Shared from other_module.ts. In short :

// shared.d.ts
declare module Shared { 
   export function SomethingElse(arg:string):any;
}
declare module 'shared'{ 
    export = Shared; 
}

And a typesafe import:

// other_module.ts

/// <reference path="shared.d.ts"/>
import Shared = require("shared"); 

export class Something {
    public someVar = new Shared.SomethingElse("blah");
}

FIX B, as you were, but you need to use a different name then

Inside other_module don't use the name Shared locally if local scope is global scope. I remend you just use external everywhere and pile for node with monjs and browser with amd as shown in fix A, but if you must here is a pile fixed other_module.ts.

// other_module.ts
/// <reference path="shared.d.ts"/>
var fooShared: typeof Shared;
if(require) {  fooShared = require("shared"); }
else { fooShared = Shared; } 
export class Something {
    public someVar = new fooShared.SomethingElse("blah");
}

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