Is it possible to pass data to app.js in Laravel?

Is it possible to pass data to app.js in Laravel? I need to pass the value of Session::getId() to app.js since I create a websocket in that file. I know it is possible to get the CSRF-TOKEN like so:

$('meta[name="csrf-token"]').attr('content');

but I need the session ID.

Thanks for any help!

via Chebli Mohamed