serializeHtml of media embed plugin

[wrrwrr111]

I encountered a problem when using the serializeHtml of the media embed plugin, and the serializeHtml cannot be carried out smoothly at present.

I wish to add some custom attributes like iframeSrc and iframeHeight ...

<iframe src={iframeSrc} data-url={url} height={iframeHeight} .../>

Then add MediaEmbedElementSerialize to this plugin

I can write this part of the code.