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Custom Errors & Extending Error

Medium

In plain terms

Extend Error for custom error types. Set name and message. Use instanceof for type checks. Improves error handling clarity.

What you need to know

  • •extends Error
  • •name, message
  • •instanceof

Try it yourself

Copy the code below and run it in your browser console or a code editor:

class ValidationError extends Error { constructor(msg) { super(msg); this.name = 'ValidationError'; } }

Learn more

Dive deeper with these trusted resources:

MDNjavascript.infoTutorialsPoint