Works locally. Fails in production. Hidden issue Browsers limit parallel connections per origin. Fix Batch requests Use request queues Prefer a single endpoint await Promise.allSettled(requests); Why Uncontrolled parallelism = dropped requests.
Tag: browser limits
Why Fetch Requests “Randomly” Hang (But Server Is Fine)
AJAX requests stall… server logs show nothing. Hidden reason Browsers limit parallel connections per origin (usually 6). When it happens Long-polling Hanging fetch calls Images + API calls from same domain Fix Abort unused requests Use AbortController const controller = new AbortController(); fetch(url, { signal: controller.signal }); // later controller.abort();