CSS/HTML5 equivilent to iframe marginheight and marginwidth

Question

I am doing a website layout for a company who uses IDevAdManager for rotating ads on their site. Unfortunately, I am not much of an expert in that field, so I can\'t give m

Answer 1

To be HTML5 valid the document inside the iframe has to get the correct style, not the iframe itself. I don't know that adManager thing but it depends on how the iframe is created.

If it is dynamic and sameorigin you can enter it by

document.getElementById("SomeIframe").contentDocument;

and set margin by style to 0.

let myFrameBody = document.getElementById("SomeIframe").contentDocument.querySelector('body');
myFrameBody.style.margin = 0;

If it is not sameorigin the owner of the document has to set this by himself, and that is never a bad idea, and also regarding HTML4.1 this would be considered valid.