The goal is to transition an element with the following as requirements:
- Transition an element vertically, between visible and not visible
- Transition must be possible in both directions: a. from visible to not visible b. from not visible to visible
- Hide the content of the element from screen readers when it is not visible
## Challenges
TO DO
TO DO
- https://www.scottohara.me/blog/2017/04/14/inclusively-hidden.html#techniques-for-properly-hiding-content
- https://css-tricks.com/using-css-transitions-auto-dimensions/#article-header-id-1
- https://cbateman.com/blog/accessible-css-transitions/
- https://webaim.org/blog/screen-readers-and-css/
- https://webaim.org/techniques/css/invisiblecontent/
- https://css-tricks.com/almanac/properties/v/visibility/
- http://www.greywyvern.com/?post=337#