fix: deletebackword list

packages/select/package.json

@@ -38,6 +38,9 @@
     "test:watch": "yarn p:test:watch",
     "typecheck": "yarn p:typecheck"
   },
+  "dependencies": {
+    "@udecode/plate-indent": "31.0.0"
+  },
   "devDependencies": {
     "@udecode/plate-common": "workspace:^"
   },

packages/select/src/queries/index.ts

@@ -0,0 +1 @@
+export * from './isIndentElement';

packages/select/src/queries/isIndentElement.ts

@@ -0,0 +1,5 @@
+import { isDefined, isElement, TElement, Value } from '@udecode/plate-common';
+
+export const isIndentElement = <V extends Value>(element: TElement) => {
+  return isElement(element) && isDefined(element.listStyleType);
+};

packages/select/src/transforms/deleteWhenEmpty.ts

@@ -0,0 +1,48 @@
+import {
+  ELEMENT_DEFAULT,
+  getAboveNode,
+  getNodeString,
+  getPreviousNode,
+  isDefined,
+  isElement,
+  PlateEditor,
+  removeNodes,
+  select,
+  TElement,
+  unsetNodes,
+  Value,
+} from '@udecode/plate-common';
+import { outdent } from '@udecode/plate-indent';
+import { Point } from 'slate';
+
+import { isIndentElement } from '../queries';
+
+export const deleteWhenEmpty = <V extends Value>(
+  editor: PlateEditor<V>,
+  pointBefore: Point
+) => {
+  const aboveEntry = getAboveNode(editor, {
+    match: (n) => isElement(n) && n.type === ELEMENT_DEFAULT,
+  });
+
+  const prevEntry = getPreviousNode(editor, {
+    match: (n) => n.type === ELEMENT_DEFAULT || n.type === 'blockquote',
+  });
+
+  if (!prevEntry || !aboveEntry) return;
+
+  const [prevCell] = prevEntry;
+  const [aboveCell] = aboveEntry;
+
+  if (!getNodeString(prevCell) && !isDefined(aboveCell.listStyleType)) {
+    removeNodes(editor);
+    select(editor, pointBefore);
+    return true;
+  }
+
+  if (!getNodeString(aboveCell) && isIndentElement(aboveCell as TElement)) {
+    outdent(editor);
+    unsetNodes(editor, ['listStyleType', 'checked']);
+    return true;
+  }
+};

packages/select/src/transforms/index.ts

@@ -0,0 +1 @@
+export * from './deleteWhenEmpty';

packages/select/src/withSelectOnBackspace.ts

@@ -15,6 +15,7 @@ import {
 import Slate from 'slate';
 
 import { SelectOnBackspacePlugin } from './createSelectOnBackspacePlugin';
+import { deleteWhenEmpty } from './transforms';
 
 /**
  * Set a list of element types to select on backspace
@@ -58,7 +59,8 @@ export const withSelectOnBackspace = <
           // don't delete image, set selection there
           select(editor, pointBefore);
         } else {
-          deleteBackward(unit);
+          // 1. don't delete the indent list element when just a bullets numbering or checkbox should be turn to default paragraph
+          if (!deleteWhenEmpty(editor, pointBefore)) deleteBackward(unit);
         }
       } else {
         deleteBackward(unit);

yarn.lock

@@ -6906,6 +6906,7 @@ __metadata:
   resolution: "@udecode/plate-select@workspace:packages/select"
   dependencies:
     "@udecode/plate-common": "workspace:^"
+    "@udecode/plate-indent": "npm:31.0.0"
   peerDependencies:
     "@udecode/plate-common": ">=31.0.0"
     react: ">=16.8.0"