Add withMerging (#5696)

.changeset/honest-rice-doubt.md

@@ -0,0 +1,5 @@
+---
+'slate-history': minor
+---
+
+Add `withMerging`

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

@@ -62,6 +62,17 @@ export const HistoryEditor = {
     editor.undo()
   },
 
+  /**
+   * Apply a series of changes inside a synchronous `fn`, These operations will
+   * be merged into the previous history.
+   */
+  withMerging(editor: HistoryEditor, fn: () => void): void {
+    const prev = HistoryEditor.isMerging(editor)
+    MERGING.set(editor, true)
+    fn()
+    MERGING.set(editor, prev)
+  },
+
   /**
    * Apply a series of changes inside a synchronous `fn`, without merging any of
    * the new operations into previous save point in the history.