Responsive contact form using vanilla css,html,js

What are you most proud of, and what would you do differently next time?

The next time I might add a modal popup instead of redirecting to a new page for the success message

What challenges did you encounter, and how did you overcome them?

had issues with the regex validation especially for the email. Are there any libraries one can use to assist with regex validation?

for the email regex validation i settled with: /\w+@\w+.\w+/