The Construct

And here's the code I use to detect whether the demo is running on a desktop or mobile device:

function isMobileDevice() {
  // Check for mobile-specific user agent keywords
  const mobileKeywords = ['Mobi', 'Android', 'iPhone', 'iPad', 'Windows Phone'];
  const userAgent = navigator.userAgent;
 
  // Check if any mobile keywords exist in the user agent string
  return mobileKeywords.some(keyword => userAgent.includes(keyword));
}
 
// Check if Storyline's player object is available
if (window.hasOwnProperty('GetPlayer')) {
  // Get the Storyline player object
  const player = window.GetPlayer();
 
  // Check if the course is being viewed on a mobile device
  const mobileView = isMobileDevice();
 
  // Set the 'mobileView' variable in Storyline to indicate if it's a mobile device
  player.SetVar('mobileView', mobileView);
}
 
/*Please ensure you have a True/False variable in Storyline named mobileView*/j