如何在Metro Style App中将日志或文本文件写入文件系统

正如标题所述，我想将我的应用程序的活动日志自动写入文件中.我的应用程序是用Javascript/HTML5构建的，在调试时，我可以使用console.log("this is a debug log")并在控制台中对其进行跟踪.但是，如果要将测试机提供给某些测试用户，则希望能够跟踪活动日志.

As the title said, I would like to write an activity log of my application into a file automatically. My application is built in Javascript/HTML5, when I am debugging I can use console.log("this is a debug log") and track it in console. But if I want to give my test machine to a certain test users, I want to be able to track the activity logs.

有什么办法可以做到这一点.

Is there any way that I can do that.