fix(comp:tree-select): cannot get node through getNode

[liuzaijiang]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

<template>
  <IxForm class="demo-form" :control="formGroup">
    <IxFormItem>
      <ix-tree-select
        style="width: 300px"
        v-bind="bindData"
        control="treeSelect"
        :dataSource="dataSouce"
        ref="treeSelectRef"
      >
        <template #expandIcon="{ expanded }">
          <ix-icon :name="expanded ? 'minus-square' : 'plus-square'" />
        </template>
      </ix-tree-select>
    </IxFormItem>
    <IxButton mode="primary" @click="onSubmit">Submit</IxButton>
  </IxForm>
</template>

<script setup lang="ts">
import { Validators, useFormGroup } from '@idux-vue2/cdk/forms'
import { ref } from '@idux-vue2/cdk/vue'

const { required } = Validators

const bindData = ref({
  multiple: true,
  showLine: true,
  cascade: true,
  checkable: true,
  searchable: 'overlay',
  labelKey: 'label',
  getKey: 'value',
  checkStrategy: 'parent',
})
const formGroup = useFormGroup({
  treeSelect: [['测试3'], [required]],
})
const treeSelectRef = ref(null)
const onSubmit = () => {
  const item = treeSelectRef.value.getNode('测试3')
  console.log(treeSelectRef.value)
  console.log(item)
}
const dataSouce = ref([
  {
    label: '测试1',
    value: '测试3',
    view: '1',
  },
  {
    label: '测试2',
    value: '测试4',
    view: '2',
  },
])
</script>

<style lang="less" scoped>
.demo-form {
  max-width: 300px;
  font-size: 12px;
}
.text-right {
  text-align: right;
}
</style>

下拉框浮层没有渲染时，无法通过getNode获取到node

What is the new behavior?

可以获取到

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1121 (ddb60d2) into main (ed08884) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

❗ Current head ddb60d2 differs from pull request most recent head cdea3a3. Consider uploading reports for the commit cdea3a3 to get more accurate results

@@            Coverage Diff             @@
##             main    #1121      +/-   ##
==========================================
- Coverage   96.92%   96.79%   -0.13%     
==========================================
  Files         321      321              
  Lines       30624    30775     +151     
  Branches     2806     2800       -6     
==========================================
+ Hits        29682    29790     +108     
- Misses        942      985      +43     

Impacted Files	Coverage Δ
packages/cdk/portal/src/Portal.tsx	100.00% <100.00%> (ø)
packages/cdk/utils/src/vNode.ts	95.40% <100.00%> (-0.30%)	⬇️
...ckages/components/_private/overlay/src/Overlay.tsx	100.00% <100.00%> (ø)
packages/components/_private/overlay/src/types.ts	100.00% <100.00%> (ø)
packages/components/cascader/src/Cascader.tsx	100.00% <100.00%> (ø)
packages/components/config/src/defaultConfig.ts	100.00% <100.00%> (ø)
packages/components/config/src/types.ts	100.00% <100.00%> (ø)
packages/components/drawer/src/Drawer.tsx	100.00% <100.00%> (ø)
packages/components/drawer/src/types.ts	100.00% <100.00%> (ø)
packages/components/dropdown/src/Dropdown.tsx	100.00% <100.00%> (ø)
... and 21 more

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