I am developing an Canvas app. in which I need to show an error or warning message when user tried to Click on Submit without Providing required fields. Currently I have implemented that Pop Up using HTML text. But when Narrator is turned on, Narrator is Not able to Read the Warning or Error Message inside the HTML pop up. I have searched for accessibility label property for an HTML pop-up But I have ended with no way to add a accessibility label for HTML. So
1. Can we make a Narrator read the Text inside the HTML pop Up? (OR)
2. Can we Replace any object instead of HTML pop up which supports the Narrator?