FIx errors on enter press when several blocks selected (#1349)

* FIx errors on enter press when several blocks selected

* Fix for safari

src/components/modules/blockSelection.ts

@@ -246,7 +246,15 @@ export default class BlockSelection extends Module {
       BlockManager.insertDefaultBlockAtIndex(indexToInsert, true);
       Caret.setToBlock(BlockManager.currentBlock);
       _.delay(() => {
-        Caret.insertContentAtCaretPosition((reason as KeyboardEvent).key);
+        const eventKey = (reason as KeyboardEvent).key;
+
+        /**
+         * If event.key length >1 that means key is special (e.g. Enter or Dead or Unidentifier).
+         * So we use empty string
+         *
+         * @see https://developer.mozilla.org/ru/docs/Web/API/KeyboardEvent/key
+         */
+        Caret.insertContentAtCaretPosition(eventKey.length > 1 ? '' : eventKey);
       }, 20)();
     }
 

src/components/modules/caret.ts

@@ -523,6 +523,13 @@ export default class Caret extends Module {
 
     Array.from(wrapper.childNodes).forEach((child: Node) => fragment.appendChild(child));
 
+    /**
+     * If there is no child node, append empty one
+     */
+    if (fragment.childNodes.length === 0) {
+      fragment.appendChild(new Text(''));
+    }
+
     const lastChild = fragment.lastChild;
 
     range.deleteContents();

src/components/modules/ui.ts

@@ -517,10 +517,6 @@ export default class UI extends Module<UINodes> {
      * remove selected blocks
      */
     if (BlockSelection.anyBlockSelected && !Selection.isSelectionExists) {
-      const selectionPositionIndex = BlockManager.removeSelectedBlocks();
-
-      Caret.setToBlock(BlockManager.insertDefaultBlockAtIndex(selectionPositionIndex, true), Caret.positions.START);
-
       /** Clear selection */
       BlockSelection.clearSelection(event);