`text-toggle` text is styled for demo.
With Polymer bindings
1. Show text based on outside condition.
2. Using element as control.
3. As an HTML anchor.
4. Chaging an outside condition.
5. Signal for change of read-only value.
Vannila Js
1. Show text based on outside condition.
2. Using element as control.
3. As an HTML anchor.
4. Chaging an outside condition.