Hi, I want to change the theme at runtime, but I got the following error when loading the iframe lazily (loading="lazy").

index.ts:13 Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://giscus.app') does not match the recipient window's origin ('http://localhost:13131').

So I'm wondering if there is an option to add the onload attribute on the <iframe>, so that I could be aware whether the iframe is ready to change theme.

Use case: I have a dark/light toggle button on my UI, users can change the color at will. I need to adjust giscus theme to the UI color at the first load.