Matching Dropdown does not show ‘Invalid Answer’ alert in HTML5
I have created a Matching Dropdown quiz in Storyline. In the HTML5 version, if Submit button is clicked without selecting any option it does not show the 'Invalid answer' alert. However, it works fine in the Flash version. I have checked this on Chrome.
As per the project requirement, I do not need Correct, Incorrect, Try Again feedback but need to show the 'Invalid Answer' alert if the user does not select the options but clicks the Submit button.
Storyline file is attached.
Has anyone encountered similar problem? If any solution or workaround is available please share. Thanks.