nsEditor exposed to JS?

[deelan]

"First note that all the interaction between XUL/JS goes via the
nsEditorShell. The lower-level editor interfaces are not (yet) exposed
to JavaScript via IDL."

does this still apply? how can i discover if the nsEditor/nsHTMLEditor
have been exposed to JS? or should i still use nsEditoShell?

and:

"Note: We are currently transitioning to a new tag specifically for editor, called, not surprisingly, <editor>. This is really just an <iframe> which takes over some of the task of creating the editor from JavaScript. As a result, some of the code fragments here may be slightly different from what you see in the codebase."

where can i gather info about <editor> tag?

thanks in advance.