How fast can you fix an e-commerce JavaScript bug?

For a blocking emergency, add-to-cart or checkout dead because of a JS error, we triage in under 4 hours and usually ship a fix the same day once we have staging access. A standard, well-defined single bug is typically resolved in 24-48 hours. A batch of errors or a deep root cause is scoped as a Bug-Fix Sprint with a committed delivery date. Send the console error text and we will confirm a timeline fast.