concat-transform.js

// A.js
import y from "B";
console.log("a");
export var x;

// B.js
import z from "C";
console.log("b");
export var y;

// C.js
import x from "A";
console.log("c");
export var z;

/*** Gets transformed into: ***/

module "A" {
  import y from "B";
  console.log("a");
  export var x;
}

module "B" {
  import z from "C";
  console.log("b");
  export var y;
}


export module "C" {
  import x from "A";
  console.log("c");
  export var z;
}