Thank you for the responses - Sorry I missed them until now!
To answer @creedon, I would like to have the slider on two different products.
I actually have a solution working right now with JSON but only on Desktops and Tablets - it does not work on mobile. Calconic offered these two options as solutions:
Basically, the desktop/tablet website breakpoint and the mobile website breakpoint use separate quantity input fields by the same name. Value output apparently prioritizes the desktop/tablet website breakpoint quantity field.
You would need to either
a) use multi-output JSON and output the same value to both quantity fields, but both fields should have different names.
b) use the same quantity field for both website breakpoints.
Is there a way to 'override' the Quantity input name reference with unique names that can be referenced by the JSON?
Thanks for all the input