Debugging: Error Handling

Objective

Students must implement try/catch blocks to handle errors gracefully and prevent application crashes.

Evidence

Error handling in game components:

• GameLevelMaze.js - Try/catch blocks for robustness
• GameLevelOutside.js - Error handling in async operations
• API integration - Fetch error catching

Implementation Details

• Try blocks for code that might throw errors
• Catch blocks for error handling
• Finally blocks for cleanup code
• Error object with message and stack
• Throwing custom errors

Error Handling Patterns

• API call errors with fetch
• Image loading errors
• Parsing JSON errors
• Null reference errors
• Division by zero handling

Key Concepts

• Error types (Error, TypeError, SyntaxError, etc.)
• Try/catch/finally structure
• Error objects and properties
• Throwing custom errors
• Error propagation and bubbling