Override body style for content in an iframe

Question

How can I control the background image and colour of a body element within an iframe? Note, the embedded body element has a class, and the iframe i

Answer 1

The below only works if the iframe content is from the same parent domain.

The following jquery script works for me. Tested on Chrome and IE8. The inner iframe references a page that is on the same domain as the parent page.

In this particular case, I am hiding an element with a specific class in the inner iframe.

Basically, you just append a style element to the head section of the document loaded in a frame:

frame.addEventListener("load", ev =>
    const new_style_element = document.createElement("style");
    new_style_element.textContent = ".my-class { display: none; }"
    ev.target.contentDocument.head.appendChild(new_style_element);
});

You can also instead of style use a link element, for referencing a stylesheet resource.