ws-pubsub-client.js

var socket = null
function subscribe(channel) {
    var subscribeUrl = jsRoutes.controllers.Application.subscribe().webSocketURL() + "?channel=" + channel
    console.log("Subscribed to: " + subscribeUrl)
    socket = new WebSocket(subscribeUrl)
    socket.onmessage = function(event) {
        $("#messages" ).prepend("<div>" + event.data + "</div>")
    }
    socket.onclose = function(event) {
        console.log(event)
    }
}
$(document).ready(function(){
    subscribe($("#channel" ).val())
    $("#channel" ).change(function(){
        if(socket) socket.close()
        subscribe($(this ).val())
    })
    $("#submit" ).click(function(){
        var publishUrl = jsRoutes.controllers.Application.publish($("#channel" ).val() ).url
        jQuery.post(publishUrl, "message="+$("#message" ).val() ).success(function(){
            $("#message" ).val("")
        })
    })
})