As an editor you will not be able to inject any scripts into the form.
You don't need a controller or ClientResourceRegister
I've been asked by a client to implement a new form on their EPIServer platform. I've gone through and created that and is all working well. However, as this is part of an integration, they would like to be able to pass the page an encoded value on a url. This value should then be decoded by the page (it will be an email address) & used to pre-populate the email field on the form.
Before I start down any of these routes, can anyone advise whether either of these paths are correct? Has anyone done anything similar and can advise?