Supposing you have several sliders on a card:
The easiest way to find the slider with the highest value would be to write a query which sorts the sliders by value (descending) and then extract their names:
extract value..name orderby value..value desc from likesDogs,likesCats,likesFish,likesChickens
In the above example, this would yield a list of widget names like so:
("likesChickens","likesDogs","likesFish","likesCats")The "first" of such a list would be the highest-ranked (with ties naturally broken in order of appearance).