build方法里面使用判断语句问题

文档参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-arkui-node-V5

具体示例代码：

import { UIContext } from '@ohos.arkui.UIContext';
import { NodeController, BuilderNode, FrameNode } from '@ohos.arkui.node';


declare class Params {
  text: string
}

@Builder
function buttonBuilder(params: Params) {
  Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceEvenly }) {
    Text(params.text)
      .fontSize(12)
    Button(`This is a Button`, { type: ButtonType.Normal, stateEffect: true })
      .fontSize(12)
      .borderRadius(8)
      .backgroundColor(0x317aff)
  }
  .height(100)
  .width(200)
}

class MyNodeController extends NodeController {
  private rootNode: BuilderNode<[Params]> | null = null;
  private wrapBuilder: WrappedBuilder<[Params]> = wrapBuilder(buttonBuilder);

  makeNode(uiContext: UIContext): FrameNode | null {
    if (this.rootNode === null) {
      this.rootNode = new BuilderNode(uiContext);
      this.rootNode.build(this.wrapBuilder, { text: "This is a Text" })
    }
    return this.rootNode.getFrameNode();
  }
}


@Entry
@Component
struct Index {
  private baseNode: MyNodeController = new MyNodeController()

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start, justifyContent: FlexAlign.SpaceEvenly }) {
      Text("This is a NodeContainer contains a text and a button ")
        .fontSize(9)
        .fontColor(0xCCCCCC)
      NodeContainer(this.baseNode)
        .borderWidth(1)
        .onClick(() => {
          console.log("click event");
        })
    }
    .padding({ left: 35, right: 35, top: 35 })
    .height(200)
    .width(300)
  }
}