Validating wizard-style form

1. How the forms are validated?
2. How do I check if a HTML form is valid?

How the forms are validated?

Basic Validation − First of all, the form must be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data. Data Format Validation − Secondly, the data that is entered must be checked for correct form and value.

How do I check if a HTML form is valid?

Using the email type, we can check the validity of the form field with a javascript function called… checkValidity() . This function returns a true|false value. checkValidity() will look at the input type as well as if the required attribute was set and any pattern="" tag .