HarmonyOS web可以显示pdf文件，那可以直接显示pdf的base64码吗？

controller: web_webview.WebviewController = new web_webview.WebviewController(); 
build() { 
  Column() { 
    Button('loadData') 
      .onClick(() => { 
        try { 
          this.controller.loadData( 
            this.content,//base64码 
            "Application/pdf", 
            "base64" 
          ); 
        } catch (error) { 
          let e: business_error.BusinessError = error as business_error.BusinessError; 
          console.error(`ErrorCode: ${e.code},  Message: ${e.message}`); 
        } 
      }) 
    Web({ src:"", controller: this.controller }) 
      .width("100%") 
      .height("100%") 
  } 
  // .backgroundColor(Color.Red) 
  .padding({top:50}) 
  .width("100%") 
  .height("100%") 
}