code: function adjustThumbPosition(x) {
        var exactVal = percentToValue(positionToPercent(x));
        var closestVal = minMaxValidator(stepValidator(exactVal));
        setSliderPercent(positionToPercent(x));
        thumbText.text(closestVal);
      }
docs: Slide the UI without changing the model (while dragging/panning)
  @param x