x-tooltip

[jarek-foksa]

Inspirations:

• http://accessibility.athena-ict.com/aria/examples/tooltip.shtml
• http://cx.codaxy.com/v/master/docs/widgets/tooltips
• http://ytiurin.github.io/html5tooltipsjs/

Sample usage:

<x-button>
  <x-label>Open</x-label>
  <x-tooltip>Click to open a new tab</x-tooltip>
</x-button>