utilize javascript to style iframe from an external domain without access to its DOM structure

I have two websites, example.com and example1.com. I'm trying to display the content of example1.com within an iframe on example.com.

For instance:

Add this code to example.com:

<iframe src='http://example1.com'>

Then add the following jQuery script at the end of the body in example.com. However, due to cross-domain restrictions, this method isn't working as expected. Any suggestions?

$(document).ready(function() {
  $("#Frame").load(function(){
    var timestamp = +(new Date());
    $("#Frame").contents().find("head").append("<link href='http://xxxxxx.com/style.css?'+ timestamp +' rel='stylesheet' type='text/css'/>");
  });
});

When the iframe from example1.com loads on example.com, the style.css file from xxxxxx.com should be included in the header of the iframe to modify its CSS content.

NOTE: I don't have control over example1.com (the iframe content).

The CMS I am using restricts server-side access, so any manipulation needs to be done client-side only. Methods like using a proxy server won't work in this scenario.

I understand there are limitations with cross-domain policies, but some solutions do exist. Thank you in advance!

Answer №1

Your best option is to utilize a proxy server to fetch and manipulate the HTML content of the iframe. Unfortunately, JavaScript does not allow access to iframes from different domains.

Source
Additional Information

Answer №2

Caution: This method may not be effective as web browsers tend to add and remove this feature regularly. One possible solution, although it may disrupt your website's design (I strongly advise against it unless absolutely necessary), is to use the seamless attribute on the iframe and apply CSS styles with important to the elements you wish to modify.

https://developer.mozilla.org/fr/docs/Web/HTML/Element/iframe

I suspect that this approach may not be widely supported, so I suggest only attempting it if all other options have been exhausted.

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