HarmonyOS web组件中的图片如何禁用长按拖动

参考：

import { webview } from '@kit.ArkWeb';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct WebComponent {
  controller: webview.WebviewController = new webview.WebviewController();
  build() {
    Column() {
      Web({ src: $rawfile('imageTemp.html'), controller: this.controller })
        .javaScriptAccess(true)
        .domStorageAccess(false)
        .zoomAccess(false)
        .onPageEnd(e => {
          if (e) {
            console.info('tag:url: ', e.url);
          }
          try {
            this.controller.runJavaScript(
              '     var images = document.getElementsByTagName(\'img\');  \n' +
                '  \n' +
                '    // 遍历所有img元素  \n' +
                '    for (var i = 0; i < images.length; i++) {  \n' +
                '        // 设置每个img元素的draggable属性为false  \n' +
                '        images[i].draggable = false;  \n' +
                '    }  ' ,
              (error, result) => {
                if (error) {
                  console.error(`run JavaScript error, ErrorCode: ${(error as BusinessError).code},  Message: ${(error as BusinessError).message}`);
                  return;
                }
                if (result) {
                  console.info(`tag: The test() return value is: ${result}`);
                }
              });
          } catch (error) {
            console.error(`ErrorCode: ${(error as BusinessError).code},  Message: ${(error as BusinessError).message}`);
          }
        })
    }
  }
}