Авария в JavaScript-приложении

captureException(error, {
  tags: { build: BUILD_ID, route, browser },
  extra: { requestId }
});

report(error, { state: appStore.getState() });

await loadConfig().catch(() => {});
render(config.theme);

const a = deferred();
const b = deferred();
api.search.mockReturnValueOnce(a.promise).mockReturnValueOnce(b.promise);

const raw = localStorage.getItem("prefs");
console.log(raw?.slice(0, 100), APP_SCHEMA_VERSION);

console.log({ ua: navigator.userAgent, hasFeature: "structuredClone" in globalThis });

assert(order.items.every(item => item.price >= 0), "negative price after merge");

console.log({ build: BUILD_ID, script: document.currentScript?.src });

for (let i = 0; i < 20; i++) { mountPanel(); unmountPanel(); }

const url = new URL("users", API_BASE);
console.log(url.href);

deploy --version previous-known-good

async function loadOrders() {
  try { return await api.orders(); }
  catch { return []; }
}

async function updateSearch(query) {
  const id = ++lastRequest;
  const data = await search(query);
  if (id !== lastRequest) return;
  show(data);
}

function runSearch(query) {
  if (flags.searchRaceFix) {
    return runGuardedSearch(query);
  }
  return runLegacySearch(query);
}

it("не применяет устаревший ответ", async () => {
  // контролируем завершение B раньше A
});

metrics.count("search.stale_response");
metrics.histogram("search.latency", duration);

function searchLatest(q) {
  currentController?.abort("superseded");
  currentController = new AbortController();
  return search(q, { signal: currentController.signal });
}

async function requestForever() {
  for (;;) {
    try {
      return await request();
    } catch {
      await delay(100);
    }
  }
}