Validating text area
The only difference is that now we want to check whether the email address looks like an email address.
We know that email addresses should include an @ symbol and end with a feasible domain name. Regular expressions are a programming language for parsing text.
If the data is valid the input box should be green.
Download Demo Source Our form contains two types of validation. Valid inputs will turn green while invalid inputs will turn red.
To get started, we'll create an HTML page that include a form with the id "contact". It should contain an label, an input (or textarea), and a span that will contain the error message.
The form in HTML will look like this: tag improves usability.
By validating form responses before accepting them, we can alert users to their errors before they submit the form.
In this way, client side form validation can vastly improve the user experience.