Error Spike Diagnosis & Monitoring

The store’s weekly Microsoft Clarity report flagged a 160% week-on-week increase in JavaScript errors.

• Diagnosis: the errors were concentrated on three specific days rather than ongoing. I traced them to conflicts between the theme and two recently integrated apps (wishlist and reviews widgets), and the timing matched that week’s integration work and theme release.
• Fix: I resolved the conflicts in the theme, replacing custom wrapper sections with the apps’ native widgets, then checked the affected product pages and product cards to confirm nothing was broken for customers.
• Monitoring: a few errors kept appearing from visitors whose browsers had cached the previous theme. I kept monitoring while those caches cleared.

The following week’s report showed no JavaScript errors, and the client received no further alerts.

Weekly summaries flag problems days after they start. Reviewing error data after every release, ideally with real-time alerting, means real issues get fixed quickly and temporary noise doesn’t create unnecessary work.