How can I use validation libraries in my project?

How can I use validation libraries in my project?

You can use validation libraries to ensure that the data your application processes meets certain criteria. Popular libraries include Joi, Yup, and Validator.js.

Can you give me an example of how to use Joi for validation?

Sure! Here's a simple example:

const Joi = require('joi');

const schema = Joi.object({
  username: Joi.string().alphanum().min(3).max(30).required(),
  password: Joi.string().min(8).required(),
});

const { error, value } = schema.validate({ username: 'abc', password: '12345678' });
if (error) {
  console.log(error.details);
} else {
  console.log('Validation passed:', value);
}

What are the benefits of using a validation library?

Using a validation library helps to reduce boilerplate code, ensures consistency in validation rules, and provides clear error messages, making your code cleaner and easier to maintain.