import { Repeater } from '@repeaterjs/repeater'; /** * Utility for mapping an event stream. */ export const map = (mapper) => (source) => new Repeater(async (push, stop) => { const iterable = source[Symbol.asyncIterator](); stop.then(() => { iterable.return?.(); }); let latest; while ((latest = await iterable.next()).done === false) { await push(await mapper(latest.value)); } stop(); });