I guess that what Denis is working on will be more robust.
Not sure what he is working on. Expanding the plugin.
The typical approach of other survey tools is to provide a function to the logic (e.g IsMoble).
The feature request for LimeSurvey would be to add a ExpressionScript function IsMobile.
Personally I would like to see a more flexible function, since the definition of what a mobile vs. desktop view is, can differ over time.
It's often only about the viewport and screen. A notebook often has a lower resolution than a smartphone. So a function in ExpressionScript with a viewport/screen estate check (e.g Width/Height).
You still have the JavaScriptcode somewhere. Perhaps a flexible approach would be to have a variable screen, where you could define not only URL mapping, but could enter JavaScript or predefined scripts and assign them to a variable.
