Split views
Stacked and side-by-side layouts show two editing views of one canonical HTML document and share history. Enable Source before switching layouts.
Prefer stacked views on narrow screens. A split does not create independent copies: save using the same instance’s getData().
Switch to wysiwyg to leave the split. Later Source activations reuse the loaded runtime.
Checked code
ts
export async function split(editor: ClassicEditor) {
await editor.setWorkspaceView('wysiwyg-source-horizontal');
await editor.setWorkspaceView('wysiwyg-source-vertical');
await editor.setWorkspaceView('wysiwyg');
}Checked against the published types; see imports and types for imports.