The message handler in OfficeJS dialogs

setTimeout.js

        /**
        * Handles messages coming from the parent
        */
        function startMessageHandler() {
            setTimeout(function() {
                var message = localStorage.getItem("dialogMessage");
                localStorage.setItem("dialogMessage", ""); // clear the message
                if(message !== undefined && message !== null && message != "")
                {
                    var msg = JSON.parse(message);
                    if(msg.message == "update") {
                        // update the form
                        updateForm(msg.settings);
                    } else if(msg.message == "close") {
                        // do nothing special here
                        return; // stops the message pump
                    } else if(msg.message == "progress") {
                        if(msg.settings.Number > 100) return;
                        $("#bar").prop("value",msg.settings.Number);
                    }
                }
                startMessageHandler(); // call again 
            }, 0);
        }