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Tic-Tac-Toe (Standalone Component)

By FrontendAtlas Team · Updated Jan 30, 2026

Build a 3x3 Tic-Tac-Toe game in an Angular standalone component. Alternate X/O turns, prevent overwrites, detect wins and draws, and offer a reset to start a new game. Concepts: components, state, event-binding.

Use a standalone Angular component as the root component.
Render a 3×3 board (9 cells).

What you’ll build / What this tests

This premium angular coding focuses on Tic-Tac-Toe (Standalone Component). You’ll apply components and state thinking with easy level constraints. The prompt emphasizes Build a 3x3 Tic-Tac-Toe game in an Angular standalone component. Alternate X/O turns, prevent overwrites, detect….

Learning goals

Translate the prompt into a clear angular API signature and return shape.
Apply components, state, event-binding techniques to implement tic-tac-toe (standalone component).
Handle easy edge cases without sacrificing readability.
Reason about time/space complexity and trade-offs in angular.

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

Use a standalone Angular component as the root component.
Render a 3×3 board (9 cells).
Alternate turns between players 'X' and 'O'.
Clicking a cell places the current player's mark (only if the cell is empty and the game is…
Detect a winner (3 in a row) and stop further moves.
Detect a draw when the board is full and there is no winner.
Show a status text (next player / winner / draw).
Include a 'Reset' button to restart the game.
Initial state shows an empty board and indicates 'Next: X'.
Clicking an empty cell places the current player's mark and switches turns.

Mini snippet (usage only)

// Example usage
const input = /* tic-tac-toe (standalone component) 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.