Some difficulties in implementing markdown editor

How to use the metadata window and release control window that have been implemented in the classic editor in the custom editor page.

I want to say that the interaction of the metabox element of the wordpress editor is particularly troublesome. I am writing a brand new markdown editor of WP-ReliableMD. I used replace_editor to rewrite the interface, but I want to use the metabox element of the WP editor itself. I don’t know how to obtain and process these interactive information normally and effectively at the js layer