I am working on something similar to this service http://admocks.adparlor.com/#facebook/video_post
User put some information in and get the download of a specific mockup with the information in it.
I have played around with html2cavas (https://html2canvas.hertzen.com/) the result isn't that good. In cases where users resizes the window this approach fails.
I am wondering if there is a better way to save the content of a specific div server side ?
Does anybody have an idea how the above mentioned service do the trick ?