pusher-js/src/runtimes/web/transports/transport_connection_initializer.ts

Pusher Channels JavaScript library for browsers, React Native, NodeJS and web workers

import { Dependencies } from '../dom/dependencies';

/** Initializes the transport.
 *
 * Fetches resources if needed and then transitions to initialized.
 */
export default function() {
  var self = this;

  self.timeline.info(
    self.buildTimelineMessage({
      transport: self.name + (self.options.useTLS ? 's' : '')
    })
  );

  if (self.hooks.isInitialized()) {
    self.changeState('initialized');
  } else if (self.hooks.file) {
    self.changeState('initializing');
    Dependencies.load(
      self.hooks.file,
      { useTLS: self.options.useTLS },
      function(error, callback) {
        if (self.hooks.isInitialized()) {
          self.changeState('initialized');
          callback(true);
        } else {
          if (error) {
            self.onError(error);
          }
          self.onClose();
          callback(false);
        }
      }
    );
  } else {
    self.onClose();
  }
}