fix(components): [table] default-expand-all invalid (#20715)

* fix(components): [table] `default-expand-all` invalid

* test: dynamic data case

* test: update

packages/components/table/__tests__/table.test.ts

@@ -1722,6 +1722,92 @@ describe('Table.vue', () => {
       expect(spy.mock.calls[0][1]).toBeTruthy()
     })
 
+    it('tree-props & default-expand-all with dynamic data', async () => {
+      wrapper = mount({
+        components: {
+          ElTable,
+          ElTableColumn,
+        },
+        template: `
+          <el-table
+            :data="testData" default-expand-all row-key="id"
+            >
+            <el-table-column prop="name" label="片名" />
+            <el-table-column prop="release" label="发行日期" />
+            <el-table-column prop="director" label="导演" />
+            <el-table-column prop="runtime" label="时长（分）" />
+          </el-table>
+        `,
+        data() {
+          return {
+            testData: [],
+          }
+        },
+        methods: {
+          setData() {
+            this.testData = [
+              {
+                id: 1,
+                name: 'Toy Story',
+                release: '1995-11-22',
+                director: 'John Lasseter',
+                runtime: 80,
+                children: [
+                  {
+                    id: 11,
+                    name: 'Toy Story',
+                    release: '1995-11-22',
+                    director: 'John Lasseter',
+                    runtime: 80,
+                  },
+                  {
+                    id: 12,
+                    name: 'Toy Story',
+                    release: '1995-11-22',
+                    director: 'John Lasseter',
+                    runtime: 80,
+                  },
+                ],
+              },
+              {
+                id: 2,
+                name: "A Bug's Life",
+                release: '1998-11-25',
+                director: 'John Lasseter',
+                runtime: 95,
+                children: [
+                  {
+                    id: 21,
+                    name: "A Bug's Life",
+                    release: '1998-11-25',
+                    director: 'John Lasseter',
+                    runtime: 95,
+                  },
+                  {
+                    id: 22,
+                    name: "A Bug's Life",
+                    release: '1998-11-25',
+                    director: 'John Lasseter',
+                    runtime: 95,
+                  },
+                ],
+              },
+            ]
+          },
+        },
+      })
+      await doubleWait()
+      let childRows = wrapper.findAll('.el-table__row--level-1')
+      expect(childRows.length).toEqual(0)
+      wrapper.vm.setData()
+      await doubleWait()
+
+      childRows = wrapper.findAll('.el-table__row--level-1')
+      childRows.forEach((item) => {
+        expect(item.attributes('style')).toBeUndefined()
+      })
+    })
+
     it('tree-props & default-expand-all & shrink & edit-value', async () => {
       wrapper = mount({
         components: {

packages/components/table/src/store/tree.ts

@@ -148,6 +148,7 @@ function useTree<T>(watcherData: WatcherPropsData<T>) {
   watch(
     () => normalizedData.value,
     () => {
+      isInitTree = true
       updateTreeData()
     }
   )