Is there a way of detecting the type of authentication used by SharePoint from the client browser?

Edit It doesn't have to be via the Client Object Model. If there is a SharePoint JS parameter that tells me this information then even better


Try this:

var ctx = new SP.ClientContext();
var user = ctx.get_web().get_currentUser();
ctx.executeQueryAsync(function() {
  var loginName = user.get_loginName();

Now you shold be able to see the type in the loginName variable.
I'm not 100% sure, but its worth a try. For example I get i:0#.w|somedomain\user and i:0#.f|aspnetmembership|otheruser

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