Function liveStateProperty

This decorator will cause a property to be updated from the state on any state change. It takes an optional expression to pull the value from the state, otherwise it will assume there exists a property on the state of the same name.

Example:

class DecoratedElement extends LitElement {

  @liveStateProperty()
  foo: string = 'bar';

  @liveStateProperty('bing.baz.bar')
  nested: string;

}