This is a Visual Studio Code extension that overrides the default behavior of the split editor commands to open new untitled files instead of showing the active file.
When the workbench.action.splitEditor command is used, a new untitled file is created and displayed in the editor to the right of the active editor.
When the workbench.action.splitEditorDown, workbench.action.splitEditorUp, workbench.action.splitEditorLeft, or workbench.action.splitEditorRight commands are used, a new untitled file is created and displayed in a new editor group in the specified direction.
Visual Studio Code version 1.46.0 or higher.
You can install the extension from the Visual Studio Code Marketplace, or by searching for "Split with New File" in the Extensions view (Ctrl+Shift+X).
After installing the extension, simply use the split editor commands (Ctrl+\ or Ctrl+K Ctrl+\ by default) as you normally would. The new untitled file will be created and displayed automatically.