width="100%" for an iframe, breaks responsiveness CSS directives
In a MediaWiki website I embed a PHP file containing a contact form via
<iframe> with the following attribute pattern:
I need the
iframe to stretch 100% inside the content wrapper containing it so I gave it
width="100%" but then CSS responsiveness directives broke down as evident from the pictures below (true at least in some web browser zooming levels).
What may cause that problem and how to handle it?