Scala Programming Projects

Adding the web socket

To add the web socket to the client, we are going to use the UIManager object, which is the entry point of the client. In Scala.js, WebSocket is part of the framework; edit the UIManager and add the web socket property to it, as follows:

val webSocket: WebSocket = getWebSocket

Some configuration is needed to create the WebSocket. We encapsulate all of the initializations into a function named getWebSocket, as follows:

private def getWebSocket: WebSocket = {
  val ws = new WebSocket(getWebsocketUri(dom.document,  "v1/cart/events")) ws.onopen = { (event: Event) ⇒ println(s"webSocket.onOpen '${event.`type`}'") event.preventDefault() } ws.onerror = { (event: Event) => System.err.println(s"webSocket.onError '${event.getClass}'") ...