How to make an iframe fit or fill 100% of its container’s remaining height

There are a lot of suggested solutions out there: mostly not working when I tried them, and some required several lines of code which seems unnecessary for such a simple issue.

After a lot of testing, I found one solution that worked 100%, at least for a PDF I’m trying to embed and display in full height using an iframe on a page.

It came from a short answer from Stack Overflow user sree¬†when the same problem was asked there. Continue reading How to make an iframe fit or fill 100% of its container’s remaining height