1、Create a filename with SaveCopy.cfg in your solution root directory, Place together with the sln File.
2、Set the file content like below,FromDirectory must be project directory
--split with ',' is support also,like below
--CopyToDirectory:"x:\YourDirectory1\,x:\YourDirectory1\"
3、Reopen the project,And then when you save the file js|html In your Project ,The file will copy To the "CopyToDirectory" ,when "FromDirectory" Ignored ,All solution subproject directory's saved file will be copyed