Rather than hardcoding the JS for forms, this web component will wrap around them, and hook into the existing action, method, field name attributes, etc. to handle form behaviors.

Custom events will allow users to run different actions on success or failure, including...

• Showing a response
• Showing a message
• Opening a toast
• Deleting the form
• Redirecting the user

More on this approach here: https://gomakethings.com/progressively-enhancing-forms-with-an-html-web-component-part-2/