HarmonyOS WebView调起媒体选择器文件类型无法区分

import web_webview from '@ohos.web.webview'; 
import picker from '@ohos.file.picker'; 
@Entry 
@Component 
struct WebComponent { 
  controller: web_webview.WebviewController = new web_webview.WebviewController() 
  acceptType: string = '' 
 
  build() { 
    Column() { 
      Web({ src: $rawfile('local.html'), controller: this.controller }) 
        .javaScriptAccess(true) 
        .onShowFileSelector((event) => { 
          console.log('MyFileUploader onShowFileSelector invoked') 
          const regExpImage: Array<string> = ['.tif', '.xbm', '.tiff', '.pjp', '.jfif', '.bmp', '.avif', '.apng', '.ico', '.webp', '.svg', '.gif', '.svgz', '.jpg', '.jpeg', '.pjpeg', '.png'] 
          const regExpVideo: Array<string> = ['.ogm', '.ogv', '.mpg', '.mp4', '.mpeg', '.m4v', '.webm'] 
          let types: Array<string> | undefined = event?.fileSelector.getAcceptType() 
          const photoSelectOptions = new picker.PhotoSelectOptions(); 
          // 过滤选择媒体文件类型为 
          if (types && types.length > 0) { 
            if (regExpImage.some(item => types?.includes(item))) { 
              photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE; 
            } 
            if (regExpVideo.some(item => types?.includes(item))) { 
              photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.VIDEO_TYPE; 
            } 
          } 
          // ... 
          return false 
        }) 
    } 
 
  } 
}