add core extensions

packages/core/src/extensions/deleteSelection.ts

@@ -0,0 +1,19 @@
+import { deleteSelection as originalDeleteSelection } from 'prosemirror-commands'
+import { Command } from '../Editor'
+import { createExtension } from '../Extension'
+
+export const DeleteSelection = createExtension({
+  addCommands() {
+    return {
+      deleteSelection: (): Command => ({ state, dispatch }) => {
+        return originalDeleteSelection(state, dispatch)
+      },
+    }
+  },
+})
+
+declare module '../Editor' {
+  interface AllExtensions {
+    DeleteSelection: typeof DeleteSelection,
+  }
+}