QA Note·Interactive Tutorial

Top 10 Web QA Scenarios

Reproduce 10 common bugs found in real web apps and learn how to capture them with the QA Note extension.

BeginnerIntermediateAdvanced

Beginner

#01

API 500 Error

Team Invite Form

Learn to capture server error responses and inspect them in the network tab.

Network ErrorConsole Logs

Beginner

#02

CSS Overflow

E-commerce Product Card

Learn to diagnose CSS layout issues by capturing element styles.

Element StylesReact Tree

Intermediate

#03

Unhandled Promise

Dashboard Analytics Chart

Learn to catch cases where API returns 200 but actually fails, using JS error capture.

JS ErrorStack TraceNetwork

Intermediate

#04

Network Timeout

Issue List Search

Learn to capture timeout errors and performance metrics.

TimeoutPerformanceNetwork

Beginner

#05

Missing Validation

Profile Settings Form

Learn to prove no-error bugs using user actions and React state.

User ActionsReact State

Advanced

#06

Infinite Re-render

Real-time Notification Panel

Learn to diagnose React infinite loops using performance metrics and error capture.

React PerformancePerformanceJS Error

Intermediate

#07

CORS Error

Checkout Address Autocomplete

Learn to catch CORS errors by capturing network, console, and JS errors simultaneously.

CORSNetworkConsoleJS Error

Intermediate

#08

z-index Conflict

DatePicker in Modal

Learn to diagnose z-index layer conflicts by comparing element styles.

Element Stylesz-indexReact Tree

Advanced

#09

CLS Layout Shift

News Article

Learn to measure image layout shift using Web Vitals capture.

Web VitalsCLSPerformance

Advanced

#10

Accessibility Violation

Multi-step Sign Up

Learn to discover keyboard accessibility violations through User Actions analysis.

User ActionsKeyboardElement Styles