Do not store focus/blur in history (#3616)

packages/slate-history/src/with-history.ts

@@ -49,16 +49,7 @@ export const withHistory = <T extends Editor>(editor: T) => {
           const inverseOps = batch.map(Operation.inverse).reverse()
 
           for (const op of inverseOps) {
-            // If the final operation is deselecting the editor, skip it. This is
+            e.apply(op)
-            if (
-              op === inverseOps[inverseOps.length - 1] &&
-              op.type === 'set_selection' &&
-              op.newProperties == null
-            ) {
-              continue
-            } else {
-              e.apply(op)
-            }
           }
         })
       })
@@ -155,7 +146,10 @@ const shouldMerge = (op: Operation, prev: Operation | undefined): boolean => {
  */
 
 const shouldSave = (op: Operation, prev: Operation | undefined): boolean => {
-  if (op.type === 'set_selection' && op.newProperties == null) {
+  if (
+    op.type === 'set_selection' &&
+    (op.properties == null || op.newProperties == null)
+  ) {
     return false
   }
 

packages/slate-history/test/undo/cursor/keep_after_focus_and_remove_text_undo.js

@@ -0,0 +1,49 @@
+/** @jsx jsx */
+
+import assert from 'assert'
+import { Transforms, Editor } from 'slate'
+import { jsx } from '../..'
+
+export const run = editor => {
+  // focus at the end
+  Transforms.select(editor, {
+    anchor: { path: [0, 0], offset: 5 },
+    focus: { path: [0, 0], offset: 5 },
+  })
+  // select all
+  Transforms.select(editor, {
+    anchor: { path: [0, 0], offset: 5 },
+    focus: { path: [0, 0], offset: 0 },
+  })
+  // remove
+  Editor.deleteFragment(editor)
+  // blur
+  Transforms.deselect(editor)
+  // focus back
+  Transforms.select(editor, {
+    anchor: { path: [0, 0], offset: 0 },
+    focus: { path: [0, 0], offset: 0 },
+  })
+}
+
+export const input = (
+  <editor>
+    <block>Hello</block>
+  </editor>
+)
+
+export const output = {
+  children: [
+    {
+      children: [
+        {
+          text: 'Hello',
+        },
+      ],
+    },
+  ],
+  selection: {
+    anchor: { path: [0, 0], offset: 5 },
+    focus: { path: [0, 0], offset: 5 },
+  },
+}