HarmonyOS 怎么进行类型判断？

import { NewsListBean, JumpData } from './Second'  
  
@Entry  
@Component  
struct Index {  
  @State message: string = 'Hello World';  
  @State jumpData: JumpData = new JumpData();  
  aboutToAppear(): void {  
    JumpByObject(this.jumpData);  
  }  
  build() {  
    Row() {  
      Column() {  
        Text(this.message)  
          .fontSize(50)  
          .fontWeight(FontWeight.Bold)  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}  
  
export function JumpByObject(params: NewsListBean | JumpData) {  
  if (params instanceof NewsListBean) {  
    console.log('11111111111111');  
  }else if(params instanceof JumpData){  
    console.log('22222222222222');  
  }  
}
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export class NewsListBean{  
  showType: number = 0//显示类型  
  dataType: number = 0//跳转类型  
  list: NewsBean[] = []  
  data: NewsBean = new NewsBean()  
  showLogo: string = ""//图标  
  showTitle: string = ""//标题  
  showMore: boolean = false//是否显示更多  
  topicImg: string = ""//专题图片  
  topicTitle: string = ""  
  jump: JumpData = new JumpData()  
  classId: number = 0  
}  
export class NewsBean{  
  id: number = 0 // ID  
  classId: number = 0 // 栏目ID  
  className: string = ""//栏目名称  
  title: string = ""//标题  
  smallText: string = ""//简介  
  pv:string = ""//阅读量  
  publishTime: string = ""//发布时间  
  label: string = ""//标签  
  isTop: number = 0//置顶  
  imageUrl: string[] = []//图片  
  liveType: string = "" // 直播状态  
  imageNum: number = 0 //图片数量  
  isVideo: number = 0 //是否是视频  
  videoTime: string = ""//视频时长  
  showType: number = 0 //显示类型  
  dataType: number = 0//跳转  
  targetUrl: string = ""//分享地址  
}  
export class JumpData {  
}
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