Collapse.js Left & Right [Feature Req.]

[davebowker]

I'm currently working on an off canvas navigation and I'm trying to use BS as much as possible.

I implemented a nav as standard and just styled it to be like a sidebar. When applying collapse to it, as I would a top of page nav, the functionality works but collapse is setting height:0 and scrolling vertical. I can overcome a lot of this in CSS.

Feature Idea: Can we also collapse left/right with .collapse-h or .collapse-v and then we can do the rest in CSS?

Thanks

EDIT:
I see that you can add .width to dictate collapse direction, however it's not working 100% and is much worse when using flexbox.

[judetucker]

@davebowker check out #21540. Is this the desired functionality?

[davebowker]

@judetucker Yup! Looks good, nice job, bud! :)

EDIT
This is what I was trying to do, but I still think that having the collapse.js be able to collapse both vertically and horizontally gives us the tools within the BS framework for us to create custom solutions.

[mdo]

Closing as dupe of #17496.