HarmonyOS webview刷新问题

参考以下代码：

import web_webview from '@ohos.web.webview';
import business_error from '@ohos.base';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController();
  @State msg1: string = ''
  @State msg2: string = ''

  build() {
    Column() {
      Text(this.msg1).fontSize(20)
      Text(this.msg2).fontSize(20)
      Web({ src: $rawfile('index.html'), controller: this.controller })
        .javaScriptAccess(true)
        .onPageEnd(e => {
          try {
            this.controller.runJavaScriptExt(
              "test(\"" + '哈哈' + "\")",
              (error, result) => {
                if (error) {
                  let e: business_error.BusinessError = error as business_error.BusinessError;
                  console.error(`run JavaScript error, ErrorCode: ${e.code},  Message: ${e.message}`)
                  return;
                }
                if (result) {
                  try {
                    let type = result.getType();
                    switch (type) {
                      case web_webview.JsMessageType.STRING: {
                        this.msg1 = "result type:" + typeof (result.getString());
                        this.msg2 = "result getString:" + ((result.getString()));
                        break;
                      }
                      case web_webview.JsMessageType.NUMBER: {
                        this.msg1 = "result type:" + typeof (result.getNumber());
                        this.msg2 = "result getNumber:" + ((result.getNumber()));
                        break;
                      }
                      case web_webview.JsMessageType.BOOLEAN: {
                        this.msg1 = "result type:" + typeof (result.getBoolean());
                        this.msg2 = "result getBoolean:" + ((result.getBoolean()));
                        break;
                      }
                      case web_webview.JsMessageType.ARRAY_BUFFER: {
                        this.msg1 = "result type:" + typeof (result.getArrayBuffer());
                        this.msg2 = "result getArrayBuffer byteLength:" + ((result.getArrayBuffer().byteLength));
                        break;
                      }
                      case web_webview.JsMessageType.ARRAY: {
                        this.msg1 = "result type:" + typeof (result.getArray());
                        this.msg2 = "result getArray:" + result.getArray();
                        break;
                      }
                      default: {
                        this.msg1 = "default break, type:" + type;
                        break;
                      }
                    }
                  }
                  catch (resError) {
                    let e: business_error.BusinessError = resError as business_error.BusinessError;
                    console.error(`ErrorCode: ${e.code},  Message: ${e.message}`);
                  }
                }
              });
            if (e) {
              console.info('url: ', e.url);
            }
          } catch (error) {
            let e: business_error.BusinessError = error as business_error.BusinessError;
            console.error(`ErrorCode: ${e.code},  Message: ${e.message}`);
          }
        })
    }
  }
}