HarmonyOS 请提供dsbridge样例代码

参考示例链接：https://ohpm.openharmony.cn/#/cn/detail/@hzw%2Fohos-dsbridge

demo参考：

import { CompleteHandler, JavaScriptInterface, WebViewControllerProxy } from '@hzw/ohos-dsbridge';
// xxx.ets
import { webview } from '@kit.ArkWeb';

@Entry
@Component
struct WebComponent {
  controller: webview.WebviewController = new webview.WebviewController();
  private myController: WebViewControllerProxy = WebViewControllerProxy.createController()

  aboutToAppear(): void {
    webview.WebviewController.setWebDebuggingAccess(true);
    this.myController.addJavascriptObject(this)
  }

  build() {
    Column() {
      Web({ src:$rawfile("public/index.html"), controller: this.myController.getWebViewController() })
        .javaScriptAccess(true)
        .javaScriptProxy(this.myController.javaScriptProxy)
        .onAlert((event) => {
          return false
        })
    }
  }

  @JavaScriptInterface(false)
  testComponentSync(args: string): string {
    return `组件中的同步方法: ${args}`
  }

  @JavaScriptInterface()
  nativeMethod(args: string, handler: CompleteHandler) {
    console.log("=======");
    handler.complete(`组件中的异步方法: ${args}`)
  }
}
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