Question WebGL Save to persistentDataPath

Hi,

I need to save some data to Application.persistenDataPath in a WebGL application. I saw that writing a file with unity to that path won't work unless some javascript is added to syncronize the file.

Code (JavaScript):

1.      SyncFiles : function()
2.      {
3.          FS.syncfs(false,function (err) {
4.              // handle callback
5.          });
6.      }

I tried it and it works. I was just wondering, is this the "correct approach" or there some method implemented in unity?