[gildas]

You haven't got it wrong, the first example in the article behaves the same in JS, see https://jsfiddle.net/L5w2q1p7/.

[krackers]

I think in JS it's easier to see because of the correspondence between Promises and async/await.

So in your example the behavior is much more obvious if you sort of desugar it as

  async function parent() {
      print("parent before");
      const p = child();
      await p
      print("parent after");
  }