What are custom errors in JavaScript?

Can you explain what custom errors are in JavaScript?

Custom errors in JavaScript are user-defined error types that extend the built-in Error class, allowing for more specific error handling.

How do I create a custom error in my code?

You can create a custom error by extending the Error class. For example:

class MyCustomError extends Error {
    constructor(message) {
        super(message);
        this.name = 'MyCustomError';
    }
}

When should I use custom errors?

Use custom errors when you need to differentiate between different types of errors in your application, making debugging easier.

Can you show me an example of throwing a custom error?

Sure! You can throw a custom error like this:

throw new MyCustomError('This is a custom error message.');