HarmonyOS web使用隐私模式

import web_webview from '@kit.ArkWeb'; 
import business_error from '@kit.BasicServicesKit'; 
@Entry 
@Component 
struct WebComponent { 
  controller: web_webview.WebviewController = new web_webview.WebviewController(); 
  @State message:string="" 
  build() { 
    Column() { 
      Text(this.message) 
      Button('是否隐私模式') 
        .onClick(() => { 
          try { 
            let result = this.controller.isIncognitoMode(); 
            if(result){ 
              this.message = '已开启隐私模式'; 
            }else{ 
              this.message = '未开启隐私模式'; 
            } 
            console.log('isIncognitoMode' + result); 
          } catch (error) { 
            let e: business_error.BusinessError = error as business_error.BusinessError; 
            console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
          } 
        }) 
      // 开启隐私模式 
      Web({ src: $rawfile('index.html'), controller: this.controller,incognitoMode:true }) 
    } 
  } 
}