Can't require in Typescript/Webpack file

[jrgleason]

I am trying to upgrade an existing project to Typescript. I have the following lines...

In legacy .coffee

@refreshAfter = after -> @thing.refresh();
@updateBefore = before -> @thing.update();
@refreshAndUpdate = @updateBefore @refreshAfter
@updateThings    = @refreshAndUpdate (opts) -> doSomething(); // ...

Just to make sure I understand what this is doing when updateThings() is called it runs

1. refreshAfter
2. doSomething
3. updateBefore

Then in my TS file I have

window['_'] = require("underscore");
require("YouAreDaChef");
// Also tried
// window['chef'] = require("YouAreDaChef");

When I run I get

ReferenceError: after is not defined

Is there something special I have to do with the module loader? Pass window to it or something?