How can I automate input validation in my application?

How can I automate input validation in my application?

You can automate input validation by using libraries or frameworks that provide built-in validation features. What technology are you using?

I'm using JavaScript with Node.js.

In that case, you can use libraries like Joi or express-validator. They allow you to define validation schemas easily.

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' });