Is there a way to replace a CSS class applied within an iframe?

I have a third-party iframe widget component embedded in my page. The only HTML string present in the body of my page is this iframe, which includes a custom button styled by the widget.jsp. In Chrome's inspector, I can only see the <iframe> component, while FireFox displays the button inside the <iframe> with the style class ".button."

<iframe src='https://www.xxxxxxxx.com/aaa/bbb/widget.jsp?par1='TEST%20BUTTON'></iframe>

https://i.sstatic.net/UX7Ce.jpg

My question now is, how can I override the styling of the .button class?

htmlcssiframe

Answer №1

It is not possible to manipulate content within a third-party iframe using JavaScript due to browser security protocols. Additionally, adding external CSS styles to the iframe is also restricted.

The recommended approach for changing the style of the iframe would be to make modifications directly within the widget.jsp file. It may be worth exploring if the provider of the widget can offer a URL parameter that enables users to customize the appearance of the iframe.

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