As always, mdn has the best javascript documentation, which clarifies the reason this mechanism exists and the fact it actually takes two callbacks: https://

As always, mdn has the best javascript documentation, which clarifies the reason this mechanism exists and the fact it actually takes two callbacks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise#thenables https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...