HarmonyOS H5异步调用arkTs函数，arkTs如何将结果返回至H5 ？

import WebView from '@ohos.web.webview';  
  
class Proxy {  
  controller: WebviewController;  
  
  constructor(controller: WebviewController) {  
    this.controller = controller;  
  }  
  
  private init = () => {  
    this.controller.runJavaScript("callback(1111)");  
  }  
  private ipcSendSync = () => {  
    return 'test'  
  }  
  
  public get javaScriptProxy() {  
    return {  
      object: this.perloadModule,  
      name: "testObject",  
      methodList: Object.keys(this.perloadModule),  
      controller: this.controller,  
    }  
  }  
  
  private readonly perloadModule = {  
    init: this.init,  
    ipcSendSync: this.ipcSendSync,  
  }  
}  
  
  
@Component  
struct JsProxy {  
  @State message: string = 'Hello world'  
  private controller: WebviewController = new WebView.WebviewController()  
  private proxy: Proxy = new Proxy(this.controller)  
  
  build() {  
    Column() {  
      Web({ src: $rawfile('jsProxy.html'), controller: this.controller })  
        .width('100%')  
        .height('50%')  
        .javaScriptProxy(this.proxy.javaScriptProxy)  
    }  
    .height('100%')  
    .width('100%')  
    .backgroundColor('rgba(0,0,0,1)');  
  }  
}  
  
class TestProxy {  
  onCallback = (data) => {  
  }  
  
  constructor(onCallback) {  
    this.onCallback = onCallback  
  }  
  
  private init = () => {  
    this.onCallback(12341)  
  }  
}  
  
@Component  
export default struct JsProxy {  
  private controller: WebviewController = new WebView.WebviewController()  
  private testProxy: TestProxy = new TestProxy((data) => {  
    this.controller.runJavaScript(`callback(${data})`);  
  })  
  
  build() {  
    Column() {  
      Web({  
        src: $rawfile('jsProxy.html'),  
        controller: this.controller  
      })  
        .width('100%')  
        .height('50%')  
        .javaScriptProxy({  
          object: this.testProxy,  
          name: "testObject",  
          methodList: ['init'],  
          controller: this.controller,  
        })  
    }  
    .height('100%')  
    .width('100%')  
    .backgroundColor('rgba(0,0,0,1)');  
  }  
}
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