[issue-926]: fix dom iterator leafing when items are empty (#958)

* [issue-926]: fix dom iterator leafing when items are empty

* update Changelog

docs/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - `Improvements` — Inline Toolbar design improved
 - `Improvements` — Conversion Toolbar now included in the Inline Toolbar [#853](https://github.com/codex-team/editor.js/issues/853)
+— `Fix` — Fix flipper with empty dom iterator [#926](https://github.com/codex-team/editor.js/issues/926)
 
 ### 2.15.1
 

src/components/domIterator.ts

@@ -96,6 +96,13 @@ export default class DomIterator {
    * @return {Number} index of focused node
    */
   private leafNodesAndReturnIndex(direction: string): number {
+    /**
+     * if items is empty then there is nothing to leaf
+     */
+    if (this.items.length === 0) {
+      return this.cursor;
+    }
+
     let focusedButtonIndex = this.cursor;
 
     /**