fix focus for tables

packages/core/src/commands/focus.ts

@@ -1,6 +1,7 @@
 import { EditorState, TextSelection } from 'prosemirror-state'
 import { Command, FocusPosition } from '../types'
 import minMax from '../utilities/minMax'
+import isTextSelection from '../helpers/isTextSelection'
 
 function resolveSelection(state: EditorState, position: FocusPosition = null) {
   if (!position) {
@@ -42,6 +43,12 @@ export const focus = (position: FocusPosition = null): Command => ({
     return true
   }
 
+  // we don’t try to resolve a NodeSelection or CellSelection
+  if (dispatch && position === null && !isTextSelection(editor.state.selection)) {
+    view.focus()
+    return true
+  }
+
   const { from, to } = resolveSelection(editor.state, position) || editor.state.selection
   const { doc } = tr
   const resolvedFrom = minMax(from, 0, doc.content.size)

packages/core/src/helpers/isTextSelection.ts

@@ -0,0 +1,6 @@
+import { TextSelection } from 'prosemirror-state'
+import isObject from '../utilities/isObject'
+
+export default function isTextSelection(value: unknown): value is TextSelection {
+  return isObject(value) && value instanceof TextSelection
+}