I try to use your slider but when pressed (left/right) arrows the value is not moving correctly. 

(value 1, min value -1, max value 7, step size 2). I press the right arrow and the value is moved to "2" but I expected that slider will be moved to "3". I would expect that the values will change according to the values displayed on the scale (similar to when dragging), not on values that are not visible.

Here is a repro: REPL.

See jQuery for comparison: https://dojo.telerik.com/ijoligUZ.