repeater

In the repeater callback, you're both calling the stop argument and awaiting it. Is it somehow both a function and a promise? Is this possible in JS? edit: I found where stop is created[1]. I can't say I've seen this pattern before, and the traditionalist in me wants to dislike the API for contradicting conventions, but I'm wondering if this was designed carefully for ergonomic benefits that outweigh the cost of violating conventions. Or if this was just toy code to try out new patterns, which is totally legit also [1]: https://github.com/repeaterjs/repeater/blob/638a53f2729f5197...

A long time ago, I wrote an abstraction called a Repeater. Essentially, the idea behind it is, what would the Promise constructor look like if it was translated to async iterables. import { Repeater } from "@repeaterjs/repeater"; const keys = new Repeater(async (push, stop) => { const listener = (ev) => { if (ev.key === "Escape") { stop(); } else { push(ev.key); } }; window.addEventListener("keyup", listener); await stop; window.removeEventListener("keyup", listener); }); const konami = ["ArrowUp", "ArrowUp", "ArrowDown", "ArrowDown", "ArrowLeft", "ArrowRight", "ArrowLeft", "ArrowRight", "b", "a"]; (async function() { let i = 0; for await (const key of keys) { if (key === konami[i]) { i++; } else { i = 0; } if (i >= konami.le