nl_tokens: JSONP Polling constructor .
pl_tokens: function JSONPPolling ( opts ) { Polling$2 . call ( this , opts ) ; this . query = this . query || { } ; // define global callbacks array if not present // we do this here (lazily) to avoid unneeded global pollution if ( ! callbacks ) { // we need to consider multiple engines in the same page if ( ! commonjsGlobal . ___eio ) commonjsGlobal . ___eio = [ ] ; callbacks = commonjsGlobal . ___eio ; } // callback identifier this . index = callbacks . length ; // add callback to jsonp global var self = this ; callbacks . push ( function ( msg ) { self . onData ( msg ) ; } ) ; // append to query string this . query . j = this . index ; // prevent spurious errors from being emitted when the window is unloaded if ( commonjsGlobal . document && commonjsGlobal . addEventListener ) { commonjsGlobal . addEventListener ( 'beforeunload' , function ( ) { if ( self . script ) <mask> . script . onerror = empty$1 ; } , false ) ; } }