Try this in
aleph.sagemath.org:
@interact
def _(f=input_box(x^2, width=20), color=color_selector()):
show(plot(f,(x,-3,3), color=color))
Now try it in a sagenb type server.
(By the way, I got a copy of a previous worksheet on
sagenb.org when I
tried making a new worksheet - it wasn't the previous one in numerical
order, either. Just confirming that report.)
Neither one works, but they fail in different ways. On a worksheet,
you get
Invalid color '#undefined', using default Color()
when you actually pick a color.
On the other hand,
@interact
def _(color=color_selector(widget='colorpicker', label="")):
show(plot(x^2,(x,-3,3), color=color))
does work, but not consistently; it seems to be a color behind at
times. Again, on aleph it doesn't really work at all.
I think that we need to at least put in a warning somewhere that this
does NOT work in any current documentation that references it,
probably before the release of 5.2, certainly before #13121 gets in.
Thoughts?