Empty start value

[joscha]

Hello,

I am trying to make the slider aware of an "empty" start value (e.g. lets say false) same as https://github.com/bgrins/spectrum supports - the knob should then be displayed in the middle and the model not changed. Only after moving the knob, the model would update and never revert to that "empty" start value. Could you give me a starting point for that (currently the post method looks like the place to add something like that?)?

[bropp]

I was also looking for something similar.

[drgould]

I'll see what I can come up with.