setting com.apple.MobileBackup for Cordova

com.apple.MobileBackup.js

document.addEventListener("deviceready", onDeviceReady,false);

function setFolderMetadata(localFileSystem, subFolder, metadataKey, metadataValue) 
{
	var onSetMetadataWin = function() {
	    console.log("success setting metadata")
	}
	var onSetMetadataFail = function() {
	    console.log("error setting metadata")
	}
	
	var onGetDirectoryWin = function(parent) {
	    parent.setMetadata(onSetMetadataWin, onSetMetadataFail, { metadataKey: metadataValue});
	}
	var onGetDirectoryFail = function() {
	    console.log("error getting dir")
	}
	
	var onFSWin = function(fileSystem) {
	    fileSystem.root.getDirectory(subFolder, {create: true, exclusive: false}, onGetDirectoryWin, onGetDirectoryFail);
	}
	
	var onFSFail = function(evt) {
		console.log(evt.target.error.code);
	}
	
	window.requestFileSystem(localFileSystem, 0, onFSWin, onFSFail);
}


function onDeviceReady() 
{
	setFolderMetadata(LocalFileSystem.PERSISTENT, "Backups", "com.apple.MobileBackup", 1);
}