Added .is-sr and .is-sr-focusable

[jbrooksuk]

Closes #150

[jbrooksuk]

Ping @jgthms is this something we can get merged in? :)

[jgthms]

This has just been copied from Bootstrap.

The idea behind Bulma is to come with more modern and up-to-date solutions, rather than simply copying features by copying code. There must be new way to show content only to text readers.

[jbrooksuk]

Yeah but every bit of research I did suggested that it's the way of doing it.

[thinksaydo]

https://webaim.org/techniques/css/invisiblecontent/

This is straight from WebAIM: use CSS. My experience as an accessibility developer is that JAWS in particular is not modern. Bootstrap uses a technique that works, even if a bit old school.

[Muhnad]

@jgthms @jbrooksuk Sorry I don't see any reason to close this PR!

@jbrooksuk I just added this PR lately #1764 you can check it. and you can add .is-sr-only-focusable as I missed to add it

[JohnAherne]

Just checking. I don't see is-sr-only-focusable any where in the docs.
Has it not been added or has it been decided not to include it for some reason

Any ideas?

[Muhnad]

@JohnAherne no I just missed adding it, you can open PR with it.