The app I'm making called Repla (https://repla.app https://repla.app) is designed for this purpose. To be able to take the things typically done in the "preview

The app I'm making called Repla (https://repla.app https://repla.app) is designed for this purpose. To be able to take the things typically done in the "preview" side of VS Code and break them out into their own window that's usable with any text editor.