Where to specify --module flag in VS Code?

Question

I'm using the brand new Visual Studio Code editor for some TypeScript. And, trying to import some classes from a d.ts like this:

import Polygon = require('esri/geometry/Polygon');

But, I'm getting a red squiggly that says:

Cannot compile external dependencies unless the --module flag is provided

My question is, where do I provide that flag? I believe it's a flag to the TypeScript compiler. In Visual Studio, it's a checkbox on the project. But in Code, I can't find any editor setting for that.

Answer 1

I just want to call out the fact that restarting the editor is an important step. I created a tsconfig.json and bashed my head against the wall for a while before I noticed the comment by antfx, and sure enough, restarting VS Code solved the problem.

Answer 2

But in Code, I can't find any editor setting for that.

You need to use tsconfig.json : https://github.com/TypeStrong/atom-typescript/blob/master/docs/tsconfig.md