Customer registration: how to validate 'date of birth' of customer?

Question

Need to check whether user has 18 years old (that's simply to do in javascript) then display error/success message and pass further.

How to add validation for 'date of birth' field in customer registration form?

Which js I should extend for this purpose?

Answer 1

You should extend this file with your own validation rule.

'/lib/web/mage/validation.js'

After you added your own validation rule just add the following to your input field

 data-validate="{'Your-validation-name':true}"

example:

data-validate="{'custom-age-validation':true}"