The picker is not interoperable with transparent values

[karolk]

My use case is when user should be able to pick any color, or transparent. I added transparent swatch to the palette, but it seems selecting this will set the alpha internally to 0 and there is no way to reset that.

http://jsbin.com/omavub/1/edit

[bgrins]

So, there is a way around this by listening to the change event and setting the picker as necessary: http://jsbin.com/omavub/3/edit. I think this use case is probably specific enough to handle in a way like this.

Also, you might keep an eye out on this pull request: #37. This is a similar kind of feature that has been implemented (where you can 'remove' a color). It may match up with what you are trying to do.