Master the art of debugging user interfaces, state management, and browser-based applications.
Build core debugging habits: reproducing bugs, reading error messages and tests, and comparing expected versus actual behavior.
Reason about data and logic bugs, including incorrect conditions, derived values, and state that falls out of sync.
Debug React-specific issues like component identity, props versus state, controlled inputs, and list rendering behavior.
Handle time-based and network-related bugs such as stuck loading states, swallowed errors, and race conditions.
Investigate issues rooted in the browser environment: DOM structure, layout, styling, events, and accessibility.
Identify and fix performance bottlenecks and leaks caused by unnecessary work, re-renders, and uncleaned resources.
Tackle complex, multi-layer bugs that combine several concepts and mimic real production incidents.