QA NoteTutorial
Scenario List
01API 500 Error
BeginnerTeam Invite Form
02CSS Overflow
BeginnerE-commerce Product Card
03Unhandled Promise
IntermediateDashboard Analytics Chart
04Network Timeout
IntermediateIssue List Search
05Missing Validation
BeginnerProfile Settings Form
06Infinite Re-render
AdvancedReal-time Notification Panel
07CORS Error
IntermediateCheckout Address Autocomplete
08z-index Conflict
IntermediateDatePicker in Modal
09CLS Layout Shift
AdvancedNews Article
10Accessibility Violation
AdvancedMulti-step Sign Up
03Unhandled Promise — Analytics Chart
3/10
1

Select "Last 90 days" from the period filter

30-day data is currently displayed normally.

Check the error

Check the TypeError in console

Capture with the extension

Captured Data
  • • JS Errors: TypeError — Cannot read properties of null (reading 'map')
  • • Network: GET /api/demo/analytics?period=90d → 200 (empty response)
  • • Console: error-level logs (with stack trace)
A
Analytics Pro
Total Visitors

12,847

+12.5%

Page Views

48,291

+8.3%

Conversion Rate

3.2%

+0.4%

Visitor Trend

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