A marketing/third-party script is throwing errors and breaking my page, what do you do?

One throwing third-party tag (a chat widget, A/B tool, or affiliate pixel) can halt every script that loads after it, breaking add-to-cart or checkout. We isolate which script is throwing using the stack trace, then sandbox it so it can fail without taking your page down, loading it async/defer, wrapping it, or deferring it until after your critical JS. Your store keeps working even when the vendor’s script does not.