I made a live demo of the concept a few weeks ago; it's such as simple but powerful hidden feature of HTML: https://news.ycombinator.com/item?id=43179649 https

I made a live demo of the concept a few weeks ago; it's such as simple but powerful hidden feature of HTML: https://news.ycombinator.com/item?id=43179649 https://news.ycombinator.com/item?id=43179649