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Multi-step Signup Form

By FrontendAtlas Team · Updated Jan 30, 2026

Build a 3-step signup flow in React that collects basic info, address info, and then shows a read-only summary before submitting. Each step should only advance when its inputs are valid.

Render a multi-step signup UI as the main component.
Step 1 (Basic info): collect name and email.

What you’ll build / What this tests

This premium react coding focuses on Multi-step Signup Form. You’ll apply react and forms thinking with intermediate level constraints. The prompt emphasizes Build a 3-step signup flow in React that collects basic info, address info, and then shows….

Learning goals

Translate the prompt into a clear react API signature and return shape.
Apply react, forms, state techniques to implement multi-step signup form.
Handle intermediate edge cases without sacrificing readability.
Reason about time/space complexity and trade-offs in react.

Key decisions to discuss

Define the exact input/output contract before coding.
Prioritize predictable edge-case handling over micro-optimizations.

Evaluation rubric

Correctness: covers required behaviors and edge cases.
Clarity: readable structure and predictable control flow.
Complexity: avoids unnecessary work for large inputs.
API discipline: no mutation of inputs; returns expected shape.
Testability: solution is easy to unit test.

Constraints / Requirements

Render a multi-step signup UI as the main component.
Step 1 (Basic info): collect name and email.
Step 2 (Address info): collect street, city, country, and an optional postal code.
Step 3 (Summary): display a read-only summary of all collected fields and a final Submit button.
Use controlled inputs for all fields (values come from component state).
Expose "Back" and "Next" buttons to move between steps (Back is disabled on the first step).
"Next" must be disabled when the current step is invalid.
Only allow Submit when all required fields across all steps are valid.
Initial render shows Step 1 and indicates the overall step (e.g. "Step 1 of 3").
Typing into inputs updates React state immediately (controlled inputs).

Mini snippet (usage only)

// Example usage
const input = /* multi-step signup form input */;
const result = solve(input);
console.log(result);

// Edge case check
const empty = input ?? null;
const fallback = solve(input);
console.log(fallback);

// Expected: describe output shape, not the implementation
// (no solution code in preview)

Common pitfalls

Mutating inputs instead of returning a new value.
Skipping edge cases like empty input, duplicates, or nulls.
Overlooking time complexity for large inputs.