TODO: Better description and documentation at README.md.
TODO: Make the disabled attribute prevent the element from being focused. The challenge is the interaction between disabled and tabindex, specially if the user (i.e. the developer using this component) changes those attributes dynamically.
TODO: Accessibility, ARIA guidelines.
TODO: Find a way to make this component a form-associated element.
TODO: Add to a webcomponents gallery:
- https://github.com/tjvantoll/clock-face/blob/master/bower.json
- https://customelements.io/
- http://component.kitchen/components
TODO: rename the component to remove the x- prefix: http://webcomponents.org/articles/how-should-i-name-my-element/
TODO: Check the "Limitations" from README.md and try to address them.
TODO: Check Web Components Best Practices.