Web Reference: Can I define custom types for user-defined exceptions in JavaScript? If so, how would I do it? Jan 16, 2025 · In this article, we explored the reasons for creating custom exceptions, the syntax required to define them, how to extend built-in error classes, and the benefits of adding properties to your exceptions. Custom JavaScript exceptions improve error handling by providing specific error types and detailed information. Use string exceptions for simple cases, custom objects for structured data, and custom error classes for professional applications.
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