How do I display a message similar to Window.alert() in OfficeJS

Question

I'm trying to display a custom message, but window.alert() is restricted in OfficeJS.

I have found a solution which suggests using app.showNotification(title, message);

Office.initialize = function (reason) {
        $(document).ready(function () {
             app.showNotification("Title For the Notification", "test");
    });
 });

Browser throws

"app is undefined error".

Which module am I missing ?

Answer 1

To answer on original question (in your title) you may use Fabric-UI Dialog API to achive this functionality. The examples of the options for available dialog's styles over here . You may use any other UI package as well ... JQuery UI, JQuery Mobile, etc.

Answer 2

In addition to using the Fabric dialog as Slava suggested, you can also use the Dialog API in Office.js. There's a discussion of it here: Use the Dialog API in your Office Add-ins .