[Feature Request] dcc.Slider - Enable user to define slider direction

[areleu]

I would like to know if there is any interest on adding the feature requested by:

plotly/dash-core-components#801 (comment)

I have an application where I am like to use sliders to crop an image (heatmap graph). The image's (0,0) is defined as the top left of the image. I'd like the y slider to start with 0 at the top, and end with the height of the image at the bottom. Currently, I cannot find a method to invert the slider to allow for the slider to go {top: low, bottom: high}, instead of the default {top: high, bottom: low}

Describe the solution you'd like
A slider where the direction from minimum to maximum could be swapped.

Describe alternatives you've considered
I tried setting the min to be higher than the max, did not work.
I've tried flipping the slider with CSS and the result is... erratic

Unfortunately, it has been an issue for a while: https://community.plotly.com/t/slider-order-reversible/46656

[gvwilson]

@areleu We'd be happy to add it, but don't have anyone we can put on it now (or in the foreseeable future). We'd be happy to prioritize review of a community PR if someone would like to create one. Thanks - @gvwilson

[enioarz]

@gvwilson I added the change in #3445, it was just matter of enabling an already existing API from rc-slider. Unfortunately I can't run the tests locally because I am currently working from an old macbook that gets hot the second I write npm, but my understanding is that adding this API should not break anything.