https://developer.mozilla.org/en-US/docs/Web/API/Element/getHTML
Element: getHTML() method - Web APIs | MDN
The getHTML() method of the Element interface is used to serialize an element's DOM to an HTML string.
web apiselementmethodmdn
https://www.syncfusion.com/forums/145597/sethtml-gethtml
setHtml getHTML | Vue | RichTextEditor | Syncfusion
Forum Thread - RichTextEditor - setHtml getHTML. Browse other users' questions about our Vue RichTextEditor components.
sethtmlvuerichtexteditorsyncfusion
https://bugzilla.mozilla.org/show_bug.cgi?id=1890506
1890506 - [wpt-sync] Sync PR 45624 - Remove getHTML() shouldn't branch on shadow root's mode