Choose Your Level
Pick the difficulty that matches where you are. You can come back and try a harder level later.
Build a Basic 3-Step Wizard
Split a long form into digestible steps with simple validation.
Dynamic Fields & Zod Validation
Handle dynamic form fields and complex validation schemas.
Auto-Save & Draft Recovery
Build a bulletproof form that saves progress automatically.
Architecting Complex Multi-Step Forms & Form Validation
Multi-step forms (such as onboarding flows, loan applications, or checkout wizards) require careful state persistence, step validation, and progress tracking. Engineering leads evaluate your ability to maintain form state across steps, validate schemas using Zod or Yup, and save unsubmitted drafts.
1. Form Architecture & State Machine Spec
Blueprint detailing step transitions, global vs step-level validation, and session draft persistence.
2. Multi-Step Form Wizard Component
React Hook Form wizard with Zod schema validation, dynamic field arrays, and accessible step indicator UI.
3. Draft Recovery & Submission Test Suite
Demonstration of auto-saving unsubmitted inputs to sessionStorage and handling backend validation errors.
Frequently Asked Questions (Complex Multi-step Form)
Should multi-step form state be stored in URL search parameters?
Storing the active step step=2 in URL search parameters allows users to bookmark or share wizard progress without exposing sensitive user inputs in the URL.
How do you validate individual steps before allowing users to proceed?
Libraries like React Hook Form paired with Zod allow trigger("fieldName") step-level validation. If step inputs fail validation rules, step transition is blocked and inline errors are focused.
What is the best way to handle form draft recovery?
Draft state can be debounced and written to localStorage or sessionStorage. On form mount, a draft restoration banner asks users if they want to resume their saved progress.
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