How can I implement error handling in custom validators?

How can I implement error handling in custom validators?

You can implement error handling in custom validators by using try-catch blocks to catch exceptions and return meaningful error messages.

Can you give me an example of a custom validator with error handling?

Sure! Here's a simple example in JavaScript:

function validateInput(input) {
    try {
        if (!input) throw new Error('Input is required.');
        if (input.length < 5) throw new Error('Input must be at least 5 characters long.');
        return 'Input is valid!';
    } catch (error) {
        return error.message;
    }
}

This function checks if the input is provided and if its length is sufficient.

What if I want to handle multiple types of errors?

You can extend the try-catch block to handle different types of errors by checking the error message or type and responding accordingly.