Level 3 · Practice
Senior practice pages
Ten pages focused on accessibility, responsiveness, state, and edge cases. Read senior techniques first, or jump to Learning for deep-dive walkthroughs.
01
Accessibility (a11y)
Missing ARIA, contrast, keyboard navigation.
02Responsive layout breaks
Mobile/tablet breakpoints that fail.
03Browser quirks
Rendering differences across browsers.
04State management bugs
UI state that doesn't reset, persist, or sync.
05Loading & async states
Spinners missing, race conditions, stale data.
06Navigation & routing
Back button, deep links, 404 handling.
07Session & auth edge cases
Expired sessions, role mismatches.
08Error recovery flows
What happens after an error — can you recover?
09Cross-level regression
Fixing one thing that breaks another.
10Exploratory charter
Open-ended: find as many bugs as possible.