Class StateRegistry

This removes a state from the registry. If the state has children, they are are also removed from the registry.

Calling this method with no arguments will return a list of all the states that are currently registered. Note: this does not return states that are queued but not yet registered.

Given a state or a name, finds and returns the StateDeclaration from the registry. Note: this does not return states that are queued but not yet registered.

Adds a callback that is invoked when states are registered or deregistered with the StateRegistry.

Example:

let allStates = registry.get();

// Later, invoke deregisterFn() to remove the listener
let deregisterFn = registry.onStatesChanged((event, states) => {
  switch(event) {
    case: 'registered':
      states.forEach(state => allStates.push(state));
      break;
    case: 'deregistered':
      states.forEach(state => {
        let idx = allStates.indexOf(state);
        if (idx !== -1) allStates.splice(idx, 1);
      });
      break;
  }
});

   The function receives two parameters, `event` and `state`.
   See <a href="../modules/state.html#stateregistrylistener">StateRegistryListener</a>

Registers a StateDeclaration or queues it for registration.

Note: a state will be queued if the state's parent isn't yet registered.

     If the state was successfully registered, then the object is fully built (See: <a href="state.statebuilder.html">StateBuilder</a>).
     If the state was only queued, then the object is not fully built.

Gets the root of the state tree. The root state is implicitly created by UI-Router. Note: this returns the internal StateObject representation, not a StateDeclaration