Even After setting the frameborder attribute in the iframe to 0 there is still some white space present around the iframe border (unlike the original url/link page). Is ther
I ran into a similar problem: I had the iframe inside a figure tag, and there was some white space between the iframe and the figcaption element.
figure
figcaption
In my case simply adding iframe { display:block } solved the issue.
iframe { display:block }