How can I use class-validator in TypeScript for advanced validation?

How can I use class-validator in TypeScript for advanced validation?

You can use class-validator to create complex validation rules in TypeScript by defining decorators on your class properties.

Can you give me an example of a custom validation decorator?

Sure! You can create a custom decorator by using the registerDecorator function. For instance, to validate a password strength, you could do something like this.

What are some built-in validators I can use?

Some built-in validators include IsEmail, IsNotEmpty, IsInt, and IsString. You can combine them for more complex validations.

How do I handle validation errors in my application?

You can catch validation errors by using the validate function and handling the returned errors in your application logic.