How can I integrate validation libraries into my project?

How can I integrate validation libraries into my project?

You can integrate validation libraries by first choosing one that fits your needs, like Joi or Yup. Do you have a specific library in mind?

I'm considering using Yup. What are the steps to integrate it?

To integrate Yup, first install it via npm with npm install yup. Then, import it into your file and start defining your validation schema.

Can you give me an example of a validation schema using Yup?

Sure! Here's a simple example:

import * as Yup from 'yup';

const schema = Yup.object().shape({
  name: Yup.string().required('Name is required'),
  age: Yup.number().positive().integer().required('Age is required'),
});

This schema validates that 'name' is a required string and 'age' is a required positive integer.

That makes sense! How do I use this schema to validate data?

You can use the validate method from Yup. For example:

schema.validate({ name: 'John', age: 30 })
  .then(function(value) {
    console.log('Valid!', value);
  })
  .catch(function(err) {
    console.log('Validation error:', err.errors);
  });