Parsley is a JavaScript library, that can work with both jQuery or Zepto, designed to validate forms easily. It is built with UX concerns in mind and tries to simplify details for the user.

Is this what you're looking for?

They are used for different scenarios:

• validator is a library to validate any kind of object and it's not associated with any framework.

• express-validator uses validator library to validate expressjs routes. Basically you can validate express routes out of the box using validator lib.

In my honest opinion you can easily create your own validator middleware. Specially if you are new to Node.js it will help you to understand how middlewares work. If you are not interested on that and you have an express application feel free to use express-validator

Also I really recommend JOI as a validator lib https://github.com/hapijs/joi it's simple and it works well.

Here is an example of a middleware (I have not tested)

const Joi = require('joi')
module.exports = function validate(joiSchema) {
  return async (req, res, next) => {
    const result = Joi.validate(req.body, joiSchema, {
      allowUnknown: true,
      abortEarly: false
    })

    if (result.error) {
      throw new result.error
    }

    await next()
  }
}

  // express route
  router.post(
    '/create',
    validateMiddleware({
      body: {
        body: { firstName: Joi.string(), lastName: Joi.string() }
      }
    }),
    (req, res, next) => {
    // your logic
   })

Parsley may be one to try. The answer above is a little dated.