I want to host a webpage that can only be served via iframes within my own domain.
An example of this in the wild would be Codepen. They sandbox the content of a "pen" in an iframe, but if you try to load the url from a browser it responds with an empty page.
I understand there might be multiple answers to this question but I'm hoping someone could point me in the right direction.
Would I be checking the referrer server side? Are there any other options?