How can I integrate Joi with Express for validation?

How can I integrate Joi with Express for validation?

You can integrate Joi with Express by using it to validate request data in your route handlers. First, install Joi using npm.

What does the validation schema look like?

A validation schema defines the structure of your data. For example, you can create a schema like this: const schema = Joi.object({ name: Joi.string().required(), age: Joi.number().integer().min(0) });.

How do I use this schema in my route?

You can use the schema in your route like this: app.post('/api/users', (req, res) => { const { error } = schema.validate(req.body); if (error) return res.status(400).send(error.details[0].message); // proceed with creating user });.

Can I customize the error messages?

Yes, you can customize error messages by passing a second argument to the Joi.string().required() method, like this: Joi.string().required().messages({'any.required': 'Name is required'}).