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Build the interaction, handle every state, and prove it through user behavior.
A hands-on frontend interview track covering accessible forms, API error mapping, duplicate-submit protection, uploads, data states, search races, optimistic rollback, URL filters, server-client boundaries, capability-aware UI, hydration, component tests, error recovery, render performance, and Playwright flows.
Recommended start
Accessible validation, API field errors, submission safety, and upload recovery.
4 active sections / 15 drills