* When some property has changed in order to update the view.
* When some property has changed in order to update the view.
-`self.state` contains state properties of the module. These properties are either given from the parent through `òpts` or computed during the life of the object.
-`self.state` contains state properties of the module. These properties are either given from the parent through `òpts` or computed during the life of the object.
-`update(state)` allow the parent to update some of the state properties.
-`update(state)` allow the parent to easily update some of the state properties.
- for all functions / properties, prefixing by underscore (`_`) means the scope is private.
- for all functions / properties, prefixing by underscore (`_`) means the scope is private.
