Premium

Invite Chips Input (Tags + Autocomplete)

By FrontendAtlas Team · Updated Feb 9, 2026

Build a Material-like invite field in React. As users type, show autocomplete suggestions, convert selections into removable chips, and support keyboard shortcuts (Enter/comma/backspace).

Render an input that creates chips below/inside the field.
Show autocomplete suggestions filtered from a fixed users list.

What you’ll build / What this tests

This premium react coding focuses on Invite Chips Input (Tags + Autocomplete). You’ll apply react and state thinking with medium level constraints. The prompt emphasizes Build a Material-like invite field in React. As users type, show autocomplete suggestions, convert selections into….

Learning goals

Translate the prompt into a clear react API signature and return shape.
Apply react, state, event-handlers techniques to implement invite chips input (tags + autocomplete).
Handle medium 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 an input that creates chips below/inside the field.
Show autocomplete suggestions filtered from a fixed users list.
Exclude already-selected users from suggestions.
Clicking a suggestion creates a chip and clears the input.
Pressing Enter or comma creates/selects a chip.
Backspace on empty input removes the last chip.
Each chip has a remove button that updates state correctly.
Support ArrowUp/ArrowDown + Enter keyboard navigation in the suggestion list.
Typing "al" surfaces matching user suggestions (name or email).
Selecting "Alice" adds one chip and it no longer appears in suggestions.

Mini snippet (usage only)

// Example usage
const input = /* invite chips input (tags + autocomplete) 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.