Are MS Office or LibreOffice native? They use DOM (not W3C DOM but their own) and good portion of scripting to glue components together. Is my Sciter.Notes ap

Are MS Office or LibreOffice native? They use DOM (not W3C DOM but their own) and good portion of scripting to glue components together. Is my Sciter.Notes application (https://notes.sciter.com https://notes.sciter.com) native? It uses native implementations of DOM, CSS, database with components glued by JS... Is any game a native app? They all use their own DOMs and almost all games use various scripting engines.