Explain error handling in JavaScript.

Mastering JavaScript Error Handling: A Software Engineer's Guide

Understanding JavaScript Errors

• Errors halt script execution.
• Different error types exist (e.g., SyntaxError, ReferenceError, TypeError).
• Understanding error messages is crucial for debugging.

The `try...catch` Statement

• `try` block encloses code that might throw errors.
• `catch` block handles errors thrown in the `try` block.
• `catch` receives an Error object containing error details.
• `finally` block executes regardless of error occurrence (optional).

Error Objects and Properties

• `name`: Error type (e.g., "TypeError").
• `message`: Descriptive error message.
• `stack`: Call stack trace for debugging.

Throwing Custom Errors

• `throw` keyword creates custom errors.
• Useful for handling application-specific situations.
• Improves error reporting and maintainability.

Using `console.error` for Logging

• `console.error()` logs errors to the console.
• Aids in identifying and tracking issues during development and testing.
• Improves debugging workflow.

Best Practices for Error Handling

• Handle predictable errors gracefully.
• Provide informative error messages to users.
• Log errors for debugging and monitoring.
• Avoid generic `catch` blocks; handle specific error types.
• Use appropriate error handling mechanisms (e.g., Promises, async/await).