We have an issue in our organization where we have people using SignUp Genius, Formstack, etc and they're all over the place. We're trying to do proof of concept for getting these things consolidated and consistent in SharePoint. We were able to meet the requirement for food signups where there can be a cap on the number of hotodog signups, but we're hung up on another requirement. Annually, we have a Halloween party and there is a costume competition. A survey is sent out after with pics of all the costumes and you pick your favorite. Is there a way to neatly have an image slider or gallery displayed on a Nintex form? I know we could manually embed each image on the form, but we'd like this to be quicker and easier for users, otherwise they're not going to use it, and it needs to keep at least close functionality or they also won't use it.
I 'm sure you cannot do that. Although this is not a Nintex issue, you will find a CORS problem about cross domain scripting that is security feature on any browser.
You need control over the domain you want to embed to remove/amend its CORS policy. If the domain has explicitely blocked Cross-Origin requests, there's nothing you can do about it.