fix: table expanded error #4223

Author: undefined

components/table/Table.jsx

@@ -20,7 +20,6 @@ import defaultLocale from '../locale-provider/default';
 import warning from '../_util/warning';
 import scrollTo from '../_util/scrollTo';
 import TransButton from '../_util/transButton';
-import Vue from 'vue';
 
 function noop() {}
 
@@ -143,7 +142,7 @@ export default {
     );
     this.CheckboxPropsCache = {};
 
-    this.store = Vue.observable({
+    this.store = this.$root.constructor.observable({
       selectedRowKeys: getRowSelection(this.$props).selectedRowKeys || [],
       selectionDirty: false,
     });

components/vc-table/src/Table.jsx

@@ -13,7 +13,6 @@ import BodyTable from './BodyTable';
 import ExpandableTable from './ExpandableTable';
 import { initDefaultProps, getOptionProps, getListeners } from '../../_util/props-util';
 import BaseMixin from '../../_util/BaseMixin';
-import Vue from 'vue';
 
 export default {
   name: 'Table',
@@ -88,7 +87,7 @@ export default {
   ),
   data() {
     this.preData = [...this.data];
-    this.store = Vue.observable({
+    this.store = this.$root.constructor.observable({
       currentHoverKey: null,
       fixedColumnsHeadRowsHeight: [],
       fixedColumnsBodyRowsHeight: {},