The < iframe> HTML element represents a nested browsing context, embedding another HTML page into the current one.
CAUTION: every < iframe> in a page requires increased memory and other computing resources. While theoretically you can use as many < iframe>s as you like, check for performance problems.
ref:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#try_it
coder for web development + noodler at programming synthesizers for sound design as hobbyist.