install_synchronous.js

<script src="https://widget.flowxo.com/embed.js" data-fxo-widget="my-own-widget-code"></script>
<script>
  // Wait until the messenger is fully
  // ready, then send a message
  FxoMessenger.on('stateChanged', function(state) {
    if (state === 'connected') {
      FxoMessenger.sendMessage('Hey!');
    }
  });

  // Subscribe to all messages received,
  // logging them to the console
  FxoMessenger.on('messageReceived', function(message) {
    console.log(message);
  });
</script>