z-index stacking issues

z-index is a classic issue with tooltip/modal libraries I've used. See:

http://codepen.io/matthewlein/pen/zoEvpN

From what I've seen, the only way to make it z-index work as intended is to append to the body, instead of a sibling like you're doing. The body is most likely not in a set z-index context, so it can be reliably set by a developer. Its happened to me plenty of times. `will-change` also creates a new stacking context, making the issue more likely in other unforeseen ways.

Start by locating where Huebee appends and positions its tooltip or modal elements, then compare that behavior with the referenced CodePen and the stacking-context cases described in the issue. Done means the picker remains visible above surrounding content, including when ancestors use z-index or will-change.

Written by the indexing model from the issue text.